The Crinoids FRO^r Dr. S. Bock's Expedition to Japan 1!M4. 7 



was swept from Sagami at a depth of 209 — 72S metres. Goraissia gra- 

 cilipes, collected at the Kei-Ishuids at a depth of 595 — 984 nieti-es, is 

 fdiiiul al Salami at 72S metres. Cijllometra disciformis occui's at tlic 

 IMiilippiiies from — 325 metres, at Sagami the species is found froiii 

 182 — 728 metres and. linally. Toxonieira at tlie Pliilippines and (he 

 Sunda-Islands, where the genus is represented by the species paupera, 

 occui'ring at a deptli of — 502 metres, was brought home h-om Saga- 

 mi from 273 metres. 



A woof of soutliern forms is also visible at (he (Joto Islands by 

 the occurrence of the species Cyllonielra manca, Psdllnp-d^nelra Wireni, 

 Metdcrinus interriq)ius and M. nohilis var. tenuis. 



The Crinoid fauna of the Bonin-Islands was (piite unknown l)e- 

 fore. Tiie 32 species that have been brought home from these islands. 

 show (hat the crinoid fauna forms a mixture between (he Soudi Japa- 

 nese fauna and thai (»f (he Sunda Islantls and Oceania wi(h a woof 

 of some more peculiar and diverging forms. Sou(h Japanese species 

 or ones closely related to these are Gomatella hrackycirra, Gomaster ser- 

 raid, Comantheria grandicalyx, GijUometra cdhopurpurea., Asterometra ant- 

 hus and Stenometra dentata. Most of the rest are represented by the 

 same or closely-related forms in the waters round the Sunda islands 

 and the Philippines or belong to species with ubiquitous distribution. 

 Eudiocrinus gracilis., formerly reported from Burma, is represented by 

 a somewhat diverging form. Of the same genus there is a new spe- 

 cies Eu. Loveni, which reminds one both of Eu. gracilis and venustidus, 

 but is otherwise a special type. It is strange that a variety of the 

 East African Gomissia ignota is foiu)d at the Bonin Islands. As a 

 parallel in the distribution one migiit quote Tropiomeira afra and Tro- 

 piometra afra macrodiscus. Both the new genera of the collection also 

 originate from these islands. The genus Biodontometra is a Gharito- 

 metrid form, most closely related to Gharitomeira, a genus known from 

 great depths at the Kermadec and Fiji islands, though the new genus 

 differs from Charitometra by having XX arms and a double opposing 

 spine, an almost unparallelled condition, formerly observed only in the 

 genus Epimetra fam. Golobomcirida: The new genus Glarkometra is 

 also interesting especially from an animal-geographical point of view. 

 The genus belongs to the subfamily Perometrituv of Antedonida:- and 

 is most closely related to the East American genus Hi/paloinetra, 



