A NEW SPECIES OF CRINOID (PTILOCKINUS PINNATUS) 

 FROM THE PACIFIC COAST, WITH A NOTE ON BATHY- 

 =* CRINUS. 



•By Austin H. Clark, 



Of tlie Ihiiled Statei^ Bureau of Fisheries. 



In working- over the stalked crinoids obtained by the United 

 States' Fisheries steamer Alhutross in the north Pacific, I find the 

 following interesting" form which has never been described. The 

 species is represented l)y twenty -four calyces, most of them with more 

 or less of the stem attached, fourteen .stems and pieces of stems, and 

 a number of detached arms and pinnules. None of the specimens are 

 al)Solutely perfect, but four are nearl}' so, having- lost oidy a few pin- 

 nules, and in one or two the distal portion of the arms. These speci- 

 mens were all obtained at station No. 3342, on September 3, 1890, in 

 .52'-' 39' 30" north latitude, 132° 38' 00" west longitude, near the coast 

 of Moresby Island, Queen Charlotte group, in a depth of 1,588 fath- 

 oms. The bottom was gray ooze and coarse sand, and the bottom 

 temperature 3.5.3'^ F. (corrected). This is remarkable in being the 

 only stalked crinoid known from the eastern Pacific, with the excep- 

 tion of the closely related Calamocrmus diomedse, A. Agassiz from the 

 Galapagos Islands. I was at first inclined to regard this form as a 

 second species of CaJamocrmus^ but a more careful examination has 

 convinced me that it should be separated generically ; and for it, there- 

 fore, I propose the generic name of 



PTILOCRINUS" Clark, new genus. 



The characters of the genus are given with those of the type species, 



l*t!l<)cr!mis phinatus. 



PTILOCRINUS PINNATUS Clark, new species. 



Tijpe.—Oiit. No. 22603, U.S.N.M. 



Basals completely anchylosed into a funnel-shaped cup as in Batlnj- 

 erhius^ about four-fifths the height of the primary radials. The height 



O'TtriXov, feather; Kpivov, lily. 



Proceedings U. S. National Museum, Vol. XXXII— No. 15f-7. 



oal 



