Material and methods Most of the type material was collected
using ROV manipulators and is preserved in 75% ethanol. One
specimen (CAS 175885) was originally fixed in 10% seawater
formalin and later transferred to 75% ethanol. In addition to
the specimens collected by ROVs, approximately twelve specimens
representing one lot were recently found in the invertebrate
zoology collection of California Academy of Sciences (CAS).
These specimens were collected by benthic trawl off the Oregon
coast in 1973 and were preserved in 75% ethanol. We have found
this material to be conspecific with the new taxon. Microscopes
used in this study include a Nikon SMZ-10 dissecting microscope,
an Olympus CH-2 compound microscope, and a Leo 1400 series
scanning electron microscope. In situ observations of living
colonies were made using high-resolution video (Ikegami HDL-40
and Panasonic WV-E550) and digital still (Nikon Cooplpix 990)
cameras (figs. 2, 3). Over 250 hours of video recordings from
San Juan, Rodriguez, Davidson and P