MONOGRAPH OF THE EXISTING CKINOIDS. 647 



In 1908 Dr. William H. Dall bestowed the name of Stilifer bathymetrce upon 

 the gasteropod figured in 1895 by Hartlaub, and Monterosato referred Bartsch's 

 Eulima ptilocrinicola to his new genus Sabinella. 



While studying the crinoids of the Copenhagen Museum I found upon a speci- 

 men of Capillaster multiradiata from Singapore a parasitic gasteropod related to 

 the species occurring on Ptilocrinus pinnatus; this Doctor Bartsch named in 1909 

 Eulima capillastericola. 



In 1912 Professors Rene Koehler and C. Vaney published an extensive memoir 

 upon the ectoparasitic gasteropods, treating in detail those parasitic upon the 

 echinoderms but adding no new information in regard to those occurring upon 

 the crinoids. In the same year I recorded the occurrence of a small species of 

 Eulima on Heterometra reynaudii from Palk Strait, Ceylon, and at the same 

 time stated that I had found the same genus parasitic on Stenometra diadema in 

 southern Japan, the specimens being in the hands of Dr. William H. Dall for 

 description. 



On some specimens of Annametra occidentals from Simon's Bay, Cape of 

 Good Hope, collected by the German South Polar Expedition, I found seven speci- 

 mens of a new parasitic gasteropod which were described in 1915 by Dr. J. Thiele 

 as Eulima capcnsis. At the same time he referred Bartsch's Eulima capillastericola 

 to Monterosato's genus Sabinella. 



In the same year Lieut. F. A. Potts noted that two or three very small gas- 

 teropods, apparently parasitic, had been found by him on comatulids at Torres 

 Strait. 



STILIFER BATHYMETRY DALL. 



PI. 57. tig. 1362. 



Host. Bathymetra, sp. 



Locality. Vicinity of Malpelo Island, Bay of Panama. 



Depth. 1,772 fathoms. 



STILIFER, SP. 



P. H. Carpenter says that Rhizocrinus lofotensis is often infested with two 

 or three small shells of Stilifer which bore comparatively large holes in its calyx. 



Carpenter's Rhizocrinus lofotensis included several distinct species, and it 

 is not certain to which form he referred; his note was, however, based at least 

 in part upon the following records: 



STILIFER, SP. 



Host. Bythocrinus, sp. 



Locality. Off the Samboes and off Sand Key, Florida. 



Depth -237, 248, and 306 fathoms. 



Remarks. Among numerous specimens of Bythocrinus, sp., from these locali- 

 ties Pourtales found one with three small Stilifers adhering to the outside of 

 the calyx, and others with small round holes in the calyx, probably bored by 

 these gasteropods. 



142140 21 Bull. 82 43 



