303 


1867.] MR. H. ADAMS ON NEW MAURITIAN SHELLS. 

For this new species and many other fine objects I am indebted 
to Mr. S. White, of Adelaide, South Australia, who procured them 
in the interior of that country. 


7. Descriptions of New Species of Shells collected by Geoffrey 
Nevill, Esq., at Mauritius. By Henry Adams, F.L.S. 

(Plate XIX.) 

Volvaria (Volvarina) pusilla, H. Ad. (PL XIX. fig. 1.) 

V. testa fusiformi , pallida ; spiv a elevata , apice obtusiascula ; 
anfr . 5, convexiuscidis, ultimo antice attemiato , postice paulum 
ascendente ; columella quadruplicates; apertura august a ; labro 
incrassato, intits dentato . 

Long. 5, diam. 2\ mill. 

TIab. Port Louis Harbour, Mauritius. 

This small species of the genus Volvaria has much the appearance 
of V. neglecta , Sow. ; but the outer lip is strongly denticulated, while 
that of V. neglecta is smooth. 

Macrochlamys minima, H. Ad. (PI. XIX. fig. 2.) 

M. testa subperforata, depressa, discoidea, tenui, vix striatula, 
pellucida, nitida ; spira planiuscula, sutura profunda ; anfr. 4, 
convexis, ultimo non descendente, basi convexo ; apertura vix 
obliqua, lunari ; perist . simplici, acuto , margine columellari 
superne reflexiuscnlo. 

Diam. 1^, alt. i mill. 

Ilab. Near Port Louis, Mauritius. 

Although this species is so minute, it appears to be adult, and is 
therefore deserving of record. 

Macrochlamys perlucida, H. Ad. (PI. XIX. fig. 3.) 

M. testa anguste umbilicata , depressa, tenui, Icevigata, pellucida, 
nitida; spira brevissime conoidea, sutura marginata ; anfr. 5L, 
convexiusculis, arete convolutis, ultimo vix descendente, peri - 
pheria rotandato, basi medio impresso ; apertura obliqua, lu - 
nari; perist. simplici, recto, margine columellari superne re- 
flexiuscido . 

Diam. 6, alt. 4 mill. 

Hab . Peter Botte, Grand Bassin, Trou-aux-Cerfs, Mauritius. 

“The animal of this species presents a very pretty appearance, the 
mantle being of a bright-yellow colour spotted with black, and the 
foot bright yellow, while the tentacles are entirely black/’ — G . Nevill. 

Stylodonta (Erepta) rufocincta, II. Ad. (PL XIX. fig. 4.) 

S. testa vix perforata, conoideo-lenticulari, solidula , superne con - 
fertim arcuato-striata, pallidc ruf a, fascia rufa supra carinam 
alteraque suturali ornata ; spira par um elevata, apice obtusa, 


304 


MR. H. ADAMS ON NEW MAURITIAN SHELLS. [Mar. 14, 


sutura leviter hnpressa ; anfr . 6, planiusculis, lente accrescen - 
tibus, ultimo antice breviter descendente , peripheria angulato , 
basi modice convexo , sublcevigato, leviter concentrice striato , 
albido; apertura obliqua , rotundatodunari ; perist . simplici, 
marginibus callo crasso junctis , coliimcllari dcclivi , incrassato , 
perforationem refiexo. 

Diam. maj. 13, min. 12, alt. 7| mill. 

//«&. On sandhills near the sea-shore, Coromandel, Mauritius. 

Stylodonta (Erepta) nevilli, II. Ad. (PI. XIX. fig. 5.) 

S. tfesfo subperforata, depresso-conica> oblique costulis undid at is 
granulosis remotiusculis munita, pallide fulva ; sjnra brcviter 
conoidea , apice obtusa, sutura impressa ; anfr . 8, convexis , lente 
accrescentibus , ultimo non descendente, ad peripheriam suban - 
gulato, subtus convexo; apertura obliqua , lunato-rotundato ; 
perist . acuto, intus laoiato, marginibus callo tenui junctis, co- 
lamellari incrassato, reflexiusculo . 

Diam. maj. 12, min. 10, alt. 7 mill. 

Hab . The Ponce Mountain, Mauritius. 

This species has characters in common with both S. snffalta, Bens., 
and £. setiliris, Bens., but is larger and less globose than the former, 
and is without the prominent columellar tooth of the latter ; while 
from the latter it also differs in being larger, less umbilicated, and in 
the absence of the undulate lines of hairs. I have much pleasure in 
naming it after Mr. Geoffrey Nevill, a very enterprising young natu- 
ralist, to whom I am indebted for the opportunity of describing this 
and the other species included in this paper. 

Pupa (Pagodella) ventricosa, II. Ad. (PI. XIX. fig. 6.) 

P. testa profunde rimata, ovata , temduscida, oblique striatula, 
pallide fusca; spira convexo- conica , sutura impressa ; anfr . 5, 
convexiusculis, ultimo ventricoso, basi rotundato ; apertura 
semiovali, plica parietali compiressa , intrant e , et dente prope 
insertionem marginis dextri munita ; perist . simplici, vix expan - 
siusculo, marginibus callo junctis, dextro subsinuato, columel - 
lari snperne dilatato. 

Long. diam. If mill. 

Hab . The Moka Ravines, Mauritius. 

This singular little species I cannot satisfactorily refer to any of 
the present subgenera of the genus Pupa, and I therefore propose a 
new subgenus for it under the name of Pagodella, which may be 
characterized as follows : — 

Subgenus Pagodella, H. Ad. 

Testa rimata, ovata, opaca ; anfr. convexi ; apertura semiovalis, 
plicis parietalibus 2; perist. tcnue, rectum, vix expansiusculum, 
marginibus callo junctis. 

Gibbus (Gibbulina) nevilli, II. Ad. (PI. XIX. fig. 7.) 

G. testa rimata, cylindracea , solidiuscula, oblique sinuato-costata, 


1867.] 


MR. II. ADAMS ON NEW MAURITIAN SHELLS. 


305 

albida; spira cylindrical apice obtusa, sutura mediocri; anfr. 9, 
planiusculis , ultimo non ascendente , basi angulato ; apertura 
parum obliqua , rhombeo-ovali , dente parietali compresso , im- 
trante, et plica columellari obsoleta munita ; perist. breviter 
expanso , maryine dextro intus labiato , columellari patent e. 

Long. 24, diam. 6 mill. ; ap. 6| mill, longa, 4 lata. 

Hab. The Pouce Mountain, Mauritins. 

“ The foot of the animal in this species is orange ; the mantle is 
also orange, slightly mottled with black anteriorly, more densely so 
posteriorly; and the tentacles are black. 55 — G. Nevill. 

I have named this species in honour of Mr. William Nevill, the 
father of Mr. Geoffrey Nevill, a gentleman well known as a mine- 
ralogist. 

Gibbus (Gonidomus) newtoni, II. Ad. (PI. XIX. fig. 8.) 

G. testa prof unde arcitato-rimata, elongatoovata , oblique costata , 
pallido-lutea ; spira convexo-conica , sutura impressa ; anfr. 8, 
convexiusculis, ultimo antice ascendente, basi co?npresso ; aper- 
tura verticali, truncato -oblong a ; perist. breviter expanso , mar - 
ginibus callo junctis , dextro intus incrassato , columellari pa - 
tente. 

Long. 24, diam. 11 mill.; ap. 7 mill, longa, 6 lata. 

Hab. Trou aux-Cerfs, Mauritius. 

“This species was first found by Mr. Caldwell at Trou-au-Cerf, 
and I have since found it alive at the same place. The animal has 
the foot of a greyish flesh-colour, the mantle light brownish grey 
closely veined with longitudinal dark brown lines, and the tentacles 
of a dull purple.” — G. Nevill. 

Ennea (Gulella) modesta, H. Ad. (PI. XIX. fig. 9.) 

E. testa profunde perforata, ovato-oblonga , tenuiuscula, conferfe 
et minute costulata, nitida, pellucida, corneo-hyalina ; spira 
ventrosa, sursum tumida, apice convexo-conica , sutura impressa; 
anfr. 11, convexis, ultimo ascendente, basi rotundato ; apertura 
vertical i, ovali, plica compressa oblique descendente prope in - 
sertionem marginis dextri munita ; perist. expanso, subsolutn , 
maryine dextro sinuato, intus tuber culifero. 

Long. 5, diam. supra medium 2}j mill. ; ap. U mill, longa, 1 mill, 
lata. 

Hab. Mauritius. 

This species, has hitherto been confounded with E. cl aval at a, Lam., 
but appears to be distinct. Among many specimens that came under 
the notice of Mr. G. Nevill there was not one of an intermediate form. 

Cyclostomus (Tropidophora) mauritianus, II. Ad. (PI 
XIX. fig. 10.) 

C. testa anguste umbilicata , ovato-conica, tenuiuscula, pallide 
fulva, strigis fulvis ornata ; spira conica, apice acutinsculu ; 
anfr. 5, convexis, bicarinatis, inter Carinas nndiqne costis irre- 

Proc. Zool. Soc. — 1807, No. XX. 


306 


MR. H. ADAMS ON NEW MAURITIAN SHELLS. [Mar. 14, 

yularibus subdist antibus muni t is ; apertura vix obliqua , subcir - 
culari ; perist. simplici , maryinibus approximate , catlo tenui 
junctis , maryine dextro recto , columellari mediocriter expanso . 

Diam. maj. 14, min. 12, alt. 17 mill. 

Hab. The Pouce Mountain, Mauritius. 

Cyclostomus scaber, H. Ad. (PI. XIX. fig. 11.) 

C. testa prof unde urnbilicata , yloboso-turbinata , tenuiuscula , spi- 
raliter costulis subdistantibus et lonyitudinaliter striis elevatis 
decussata, basi costulis spiralibus propioribus , iw umbilico re - 
motioribus y pallide carnea , fascia rufa anyusta infra periphe- 
riam ornata ; spira turbinata , apice obtusiuscula ; anfr. 5, 
convexis, ultimo rotundato ; apertura vertically circnlari ; perist. 
simpliciy rectOy continuo , superne subanyulatOy breviter adnato . 

Diam. maj. 12, min. 10, alt. 11 mill. 

The Pouce Mountain, Mauritius. 

Omphalotropis costellata, H. Ad. (PI. XIX. fig. 12.) 

O. umbilicatay ovato-conica y tenuiusculay spiraliter costidis 

fliformibns subdistantibiiSy circa umbilicuni remotioribusy 
superne fere obsolete mnnitay jwllide carneay versus apicem 
rubida , striyis fulyuratis rufis picta ; spira conica y apice acu - 
sutura profunda ; anfr. 7, convexiuscidisy ultimo ro- 
tundatOy in umbilico liris cequalibus munito ; apertura subver- 
ticaliy ovuli ; perist. recto , acutOy maryinibus callo tenui junctis, 
columellari subincrassato , expaniusculo. 

Long. 10, diam. 7 mill.; ap. 6 mill, longa. 

Hab. The Pouce Mountain, Mauritius. 

Omphalotropis picturata, H. Ad. (PI. XIX. fig. 13.) 

0. testa perforata , ovato-eonica, oblique confertim striatula , 
corneo-rufa , maculis et striyis albis not at a ; spira conica, apice 
acuminata , sutura submaryinata et crenulata ; anfr. 6, con- 
vexheculisy ultimo rotundato ; apertura subvertica.li , oblonyo- 
ovata ; perist. simplici , maryine dextro recto , columellari vix 
expansiusculo . 

Long. 6, diam. 3 mill. ; ap. 2 mill, longa. 

llab. The Pouce Mountain, Mauritius. 

“ The animal in this species has the tentacles yellow, tipped with 
dark brown ; the foot almost white ; the mantle a kind of grej 
(varying), with its sides dark brown, and the same colour between 
the tentacles.”— G. Nevill. 

Cassidula parva, II. Ad. (PI. XIX. fig. 14.) 

C. testa snbperforata , ovato-conica, solidula , spiraliter confertim 
costulata ( prope suturam costulis majoribus ), lonyitudinaliter 
minute striata , sordide alba ; spira conica, apice mucronata ; 
anfr. 6, convexiusculis , ultimo basi attenuato, antice crista ob- 
tusa munito ; apertura subobliqua , ovali ; plica parietali 1, 
compressa, subtransversa , nodulo supero ohsoleto ; plica coin - 


1867.] 


MR. H. ADAMS ON NEW SHELLS. 


307 


mellari paulo minor e y illi parallela ; perist. simplici , margine 
dextro vix expansiusculo , in tus medio unidentato , columellari 
calloso , dilatato . 

Long. 4, diam. 2J mill. ; ap. 2 mill, longa. 

Port Louis Harbour, Mauritius. 

Plecotrema exigua, H. Ad. (PI. XIX. fig. 15.) 

P. testa prof unde rimata y ovato-conica , solida } spiraliter valde 
sulcata , longitudinaliter striata y pallide fulva ; spira conoidea , 
apice mucronata ; anfr. 8, planiusculis y infra suturam sidco 
prof undo et lato exaratis y ultimo basi attenuato y pone apertu- 
ram valde cristato ; apertura subobliqua , august a ; plicis parie- 
talibus 2, snperiore tuber culiformi, altera bipartita ; plica co- 
lumellari compressa y subhorizontali ; perist . simplici y margini- 
bus callo crasso junctis y dextro intus incrassato , tridentato, 
dente snperiore minuto y columellari dil at ato y paten te. 

Long. 6, diam. 3^ mill. ; ap. 2 mill, longa. 

Hab. Trou d’Eaux Douces, Mauritius. 


8. Descriptions of New Species of Shells. 

By Henry Adams, E.L.S. 

(Plate XIX.) 

Nanina (?Rottjla) conulus, H. Ad. (PI. XIX. figs. 16, 16a.) 

N. testa imperforata , trochiformi y tenui y oblique striata , superne 
liris spiralibus obsoletissimis signata , rubello-cornea y ad cari - 
nam et ad sutnras pallidiore ; spira conoidea y apice obtusius- 
cula y sutura distincta ; anfr . 6, convexiusculis , ultimo non 
descendente y carinato y basi convexo ; apertura subobliqua , te - 
tragono-lunari ; perist. recto , acuto y marginibus convergentibus, 
columellari verticali y superne breviter reflexo . 

Diam. maj. 11, min. 10, alt. 12 mill. 

Hab . Newera Ellia, Ceylon (Coll. F. Layard ). 

This species, which is closely allied to N. concavospira y Pfr., was 
obtained by Mr. Frederick Layard from Newera Ellia, Ceylon, at an 
elevation of 6500 feet above the level of the sea. I have referred it 
with doubt to the subgenus Rotula, the animal of the typical species, 
N. detecta y not being known. In the figure given of the animal, in 
this case, the truncature of the foot is distinctly shown ; while the 
animals of certain Indian species, considered by Mr. AY. T. Blanford 
to belong to the same subgenus, are without such truncature, the 
mucus-pore being above the flattened posterior extremity. 

Bulimulus (Ena) pusillus, H. Ad. (PI. XIX. fig. 17.) 

B. testa sinistrorsa y rimato-perforata y cylindrico-turrita y tenui y 
incequaliter striata y vix nitidula y olivaceo-fusca ; spira elongata , 
sursum parum attenuata y apice obtusiuscula , sutura distincta ; 


