276 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 48. 



at one-fourth the length of body. Polian vesicle and stone-canal 

 single, the latter ending in a folded madreporite. Respiratory trees 

 2, short, with a few branches. Genital tubes in the shape of vesicles, 

 in 2 tufts. 



This species is characterized by its robust tables. From Ps. mixta 

 Ostergren it differs in the shape of deposits and calcareous ring. 



Habitat — Off Goto Islands, west of Kyushu. 



Type.— Cat. No. 34178, U.S.N.M. 



Genus AMPHICYCLUS Bell. 



79. AMPHICYCLUS JAPONICUS Bell. 



Amphicyclus japonicus Bell, Studies in the Holothuroidea, vol. 3, 1884, pp. 253- 

 254. — Ohshima, System of Phyllophorinse, 1912, pp. 71-76, pi. 1, figs. 5, 6, 

 text-figs. 2, 3a-o. 



Pseudocucumis japonicus Ludwig, Alte und neue Holothurienarten, 1887, p. 

 1239. — Augustin, Japanische Seewalzen, 1908, p. 29. 



Station 5069. Three specimens. 

 For a detailed account of this species, I refer to my former paper. 

 Habitat — Tsugaru Strait (Bell, 1884); Uraga Channel (Augustin, 

 1908); Numa, Sagami Sea; Suruga Bay; Province Echizen ? (Ohshi- 

 ma, 1912). 



Genus PHYLLOPHORUS Grube. 



80. PHYLLOPHORUS CYLINDRICUS, new species. 

 Plate 11, figs. 28a, 6. 



Station 5021. One specimen. 

 Body long and cylindrical, of almost uniform diameter throughout, 

 ending bluntly at both extremities, where the mouth and anus open. 

 Length, 100 mm.; diameter, 13 mm. Color, gray all over. Integu- 

 ment thick, full of creases and slightly rough to the touch. Tenta- 

 cles deep purplish-black in color; only 12 are present, of which 8 are 

 large and 4 small. Pedicels contracted, distributed all over the body 

 without any serial arrangement, except near the posterior end, 

 where they form a double row in each ambulacrum. General peri- 

 some with rather scattered tables (pi. 11, figs. 28a, b). Disk irregu- 

 lar, with serrated contour, and 6-28 holes arranged in a circle or two 

 concentric circles; disk diameter 130-225//, with a mean of 170 p.. 

 Over the large central hole spans an arch with 4, very rarely 3 or 5, 

 arms, on each of which stands a pillar. These pillars unite to form 

 a spire which ends with an incomplete, toothed crown. Height of 

 spire, 60-130/*. Similar but more irregular tables are found in 

 pedicels. End plate single, well developed, measuring 0.4-0.6 mm. 

 in diameter. The introvert tables have delicate disk, measuring 

 150-260/*, and with an imperfect spire. Toward the base of the 

 tentacles these tables gradually give place through many interme- 



