no. 2073. HOLOTHURIANS FROM NORTHWEST PACIFIC— OHSHIMA. 243 



and measure about 8 mm. in length. Numerous C-shaped deposits 

 are found in general perisome, tentacles, papillae, pedicels, and genital 

 organ, and very rarely in peritoneum, but never present in intestine. 

 Diameter of these deposits measures 45-130//, most commonly 80- 

 100/*. Mingled with these but less numerous are straight or curved, 

 unbranched and spinose rods, 140-880// long, most commonly 400- 

 600«. No other kind of deposits is found. Calcareous ring made 

 up of five radials only, which have four pairs of branching processes. 

 Stone-canal opens about 10 mm. behind the tentacular crown. 

 Polian vesicle single. Intestine connected to body-wall by means 

 of numerous filaments, instead of mesentery; cloaca globular but 

 without coecal appendage. 



There is a remarkable agreement in every character between the 

 present species and S. globosa Theel. The two forms differ from 

 each other only, first, in relative width of body to length; second, in 

 position of the second and third pairs of papillae; and, third, in de- 

 velopment of coecal appendage. The species may therefore better 

 be separated, and is named in honor of Prof. J. Hjalmar Theel, of 

 the Naturhistoriska Riks-Museum, Stockholm, for his splendid work 

 on the deep-sea holothurians. 



Habitat.- — Nemuro Strait, east end of Hokkaido. 



Type.— Cat. No. 34159, U.S.N.M. 



Genus ENYPNIASTES Theel. 



34. ENYPNIASTES EXIMIA Theel. 



Enypniastes eximia Theel, Challenger Holothurioidea, pt. 1, 1882, pp. 56-57, 

 pi. 8, figs. 6, 7. — Sluiter, Siboga Holothurien, 1901, pp. 77-79, pi. 2, figs. 

 8, 9; pi. 10, fig. 5. — Mitsukuri, Actinopodous Holothurioidea, 1912, pp. 

 215-218, pi. 7, figs. 59, 60. 



Station 4906. Nine specimens. 



Station 4907. Twelve specimens. 



Station 4914. Two specimens. 

 Body up to 90 mm. in length. In a specimen preserved in for- 

 malin, color is totally gone. One can clearly make out 12 papillae 

 forming together a large brim, median genital papilla, 3 pairs of 

 dorsal papillae, and 8 pairs of pedicels rather crowded near the pos- 

 terior end of body. In all the other specimens, which are preserved 

 in alcohol, the ground color is reddish- violet, which is specially in- 

 tense on pedicels and papillae, and replaced by dark brown in tenta- 

 cles. The most striking fact is that the ovarian ova are of consider- 

 able size, exceeding all records for holothurians, being 3-3.5 mm. in 

 diameter. 



As it is difficult in such highly delicate animals to make out in 

 preserved specimens the real disposition of appendages, it is rather 

 doubtful to me whether the genus Euriplastes Kcehler and Vaney 

 can really be kept separate from Enypniastes. 



