no. 2073. HOLOTHURIANS FROM NORTHWEST PACIFIC— OHSHIMA. 277 



diate forms to elongated, spinose plates, 320-640// long. Tentacles 

 supported by rodlike, spinous plates, up to 680// in length. Anal 

 papillae and teeth present. Calcareous ring consists of 10 narrow 

 segments, 9 mm. long and 3 mm. wide, each with a deep posterior 

 indentation, but no prolongations. The anterior margin of radial 

 segments is divided into 2 unequal halves. Retractors inserted to 

 body wall at different levels; the mid ventral one 16 mm., the dorsal 

 ones 23 mm., from the anterior end of body. Polian vesicle and 

 stone-canal single. Genital tubes unbranched. Respiratory trees 

 2, each consisting of a thick stem and 2 rows of side branches. 



This species is characterized by its cylindrical, Synapta-]ike body 

 and the narrow segments of its calcareous ring. Judging from the 

 shape of the calcareous ring, the normal number of tentacles is prob- 

 ably 15, and Orcula luminosa Lampert is very close to it. Though 

 0. "barthii Troschel has been reported as being destitute of deposits, the 

 tables figured by Kalischewskij 1 resemble those of the new species. 



Habitat — Off Cape Terpyeniya, Sakhalin. 



Type.— Cut. No. 34179, U.S.N.M. 



81. PHYLLOPHORUS GLAUCUS, new species. 

 Platen, figs. 29a-c. 



Station 4782. One specimen. 

 Body fusiform, much tapering toward the posterior end. Length 

 40 mm., including the well defined introvert of 3.5 mm.; diameter, 

 13.5 mm. Integument transversely wrinkled, rough to the touch. 

 Color purplish-gray, with tips of pedicels colored blackish-purple. 

 Tentacles 15, of 2 different sizes. Ten are large, situated interradially 

 in pairs; the other 5 are small, radial in position, and form an inner 

 circle. Pedicels nonretractile, arranged in more or less conspicuous 

 rows all over the body with the exception of the introvert; much more 

 crowded in trivium than in bivium, where they form distinct double 

 rows hi the radii. General perisome and pedicels stiffened with nu- 

 merous tables (pi. 11, figs. 29a-c). They resemble those found in 

 Pseudocucumis tabulatus, with round disk and robust spire. Mean 

 diameter of disks, 130//; range, 90-185//; peripheral holes usually in a 

 single circle, numbering 9-25. Spire consists of 4-7 pillars, 55-75// 

 high, ending with numerous apical spines. On the under side of the 

 disk an irregularly branched arch covers the large central hole (fig. 

 29c). Tables in the introvert are almost of the same size as the fore- 

 going, but the margin of disk is serrated or spinose. Five anal teeth 

 present. Tables in pedicels are similar to general perisome, only 

 smaller, averaging 100// in diameter. End plate well developed, 350- 

 400// in diameter. Scattered in dorsal perisome are found small end 

 plates, measuring 90-160// hi diameter, representing rudimentary 



1 Echinodermen fauna d. sibir. Eismeeres, 1907, pi. 1, figs. 46, o. 



