232 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.48. 



Calcareous ring consists of 15 saddle-shaped segments, each meas- 

 uring 6 mm. by 4 mm., similar to those described in 0. sulcata Ludwig. 

 Polian vesicle single. Stone-canal calcified, ending in a knoblike 

 madreporite attached to the body wall. Genital tubes branched 

 many times, forming two tufts. I think I could make out a respira- 

 tory tree on the right side, though I can not be quite certain on this 

 point, owing to the large mass of intestine which prevented more 

 accurate observation. 



From G. sulcata this species differs in shape and size of deposits 

 and in number of tentacles. The genus resembles Pseuctostichopus 

 more than any of the forms of Elasipoda. Some aberrant forms of 

 Molpadiidas also show relationships with this genus. 



Habitat. — Aleutian Islands. 



Type.— Cat. No. 34152, U.S.N.M. 



Genus P^ELOPATIDES Theel. 



19. P-ELOPATLDE3 APPENDICULATA Theel. 



P&lopatides appendiculata Theel, Challenger Holothurioidea, pt. 2, 1886, pp. 158- 



159. — Mitstjkuri, Actinopodous Holothurioidea, 1912, pp. 9-10. 

 t?)Pselopatides purpureo-punctatus Slutter, Siboga Holothurien, 1901, pp. 43-44. 



Station 4971. One specimen. 



Station 5053. Two specimens. 

 Habitat— South of Totonii, Honshu (Theel, 1886); Flores and 

 Sulu Sea (Sluiter, 1901); Suruga Bay (Mitsukuri, 1912); off Kii, 

 Honshu. 



20. P^ELOPATEDES (?), species. 



Station 5029. One specimen. 



Station 5030. Two specimens and a fragment. 

 The largest specimen measures 90 mm. in length and the breadth is 

 about 15 mm. throughout. Skin is totally scraped off, the trans- 

 versely wrinkled muscle layer being exposed externally. Color of the 

 anterior region including tentacles is grayish-purple, while the rest of 

 body is yellowish-brown. Owing to maceration only 6 tentacles 

 could be made out, and no trace of calcareous ring or deposits could 

 be found. Musculature is well developed, each longitudinal muscle 

 being 10 mm. wide and divided into two bands. Polian vesicle and 

 stone-canal single. Though the whole digestive tube is wanting, its 

 course seems to be normal, as judged from mesenteries left on the 

 body wall. Genital organ rudimentary, respiratory trees 2, about 

 40 mm. long. The specimens are in too bad a condition for the pedi- 

 cels and papillae to be described. 



Habitat. — Off Cape Terpyeniya, Sakhalin; east of southern Sakhalin. 



