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                 Memoirs from the Biological Laboratory
                                 OF THE
                        JOHNS HOPKINS UNIVERSITY
                                  IV, 4
                        WILLIAM K. BROOKS, EDITOR

                        PHYSIOLOGY AND HISTOLOGY
                                   OF
                             THE CUBOMEDUSÆ

                                INCLUDING

               DR. F. S. CONANT’S NOTES ON THE PHYSIOLOGY

       A DISSERTATION PRESENTED TO THE BOARD OF UNIVERSITY STUDIES
                     OF THE JOHNS HOPKINS UNIVERSITY
                 FOR THE DEGREE OF DOCTOR OF PHILOSOPHY

                                   BY
                              E. W. BERGER

                                BALTIMORE
                         THE JOHNS HOPKINS PRESS
                                  1900

                             [Illustration]

                               PRINTED BY
                        The Lord Baltimore Press
                         THE FRIEDENWALD COMPANY
                         BALTIMORE, MD., U.S.A.




This Memoir is a continuation of the work upon the Cubomedusæ which was
begun by the late Dr. FRANKLIN STORY CONANT, and it contains his notes
of physiological experiments, as well as new results which have been
obtained by Dr. E. W. BERGER from the study of material which had been
collected by Dr. CONANT, who had hoped to make it the object of further
study.

In order that this work may be made public as a continuation of Dr.
CONANT’S researches, his sister, GRACE WILBUR CONANT, has, with the
coöperation of other members of his family, made an adequate and generous
provision for its publication.

For this gift, which is at once a contribution to science and a memorial
of an able and promising investigator, lately student and fellow in
this institution, the Johns Hopkins University returns its grateful
acknowledgments.

                                    DANIEL C. GILMAN, _President_.
                                    W. K. BROOKS, _Professor of Zoölogy_.




CONTENTS.


                                                                      PAGE
    INTRODUCTION.

      History                                                            1

      Epitome of Anatomy                                                 2

    PHYSIOLOGICAL.

      CHARYBDEA.

        Light