274 ECHTNODERMA OF THE INDIAN MuSEUM, PART VII. 



PHRYNOCRINUS NUDUS. 



Phrynocrinus niidus 1907. A. H. Clark. Proc. U. S. Nat. Mus., vol. 32. p. 507, 

 fig. 1, p. 508. 



Habitat. — Soutliern Japan. 

 Depth. — 640 fathoms. 



Family BOURGUETICRINIDiE. 



Bourgueticrinidce. 1882. de Lobiol, Paleontologie fran9aise, Terrain jurassique, 

 vol. 11, p. 74. 



Genus BATHYCRTNUS. 



Bathijcrinvs 1872. Wyville Thomson, Proc. Roy. See. Edinburgh, vol. 7, p. 772 

 (Bathycrinus gracilis, sp. nov.). 



BATHYCRINUS WOODMASONI. 



Bathycrinus woodmasoni 1909. A. H. Clark, Proc. Biol. Soc. Washington, 

 vol. 22, p. 150. 



Description. — This species is nearest to B. equatoriaHs from between the 

 Marquesas Islands and Central America but, though considerably larger, it is of 

 a more delicate build. 



The type specimen consists of a stem lacking the topmost columnars. 

 Stem (without the proximal portion) smooth and slender, enlarging very 

 gradually toward the root, the distal columnars with the articulations not espe- 

 cially swollen, the radicular cirri confined to the terminal columnar; length 

 327 mm., with one hundred and six columnars. Topmost columnar present twice 

 as long as broad , the following increasing to two and one half times as long as 

 broad on the fourth, then more gradually to three times as long as broad on the 

 fourteenth, and nearly four times as long as broad on the twenty-third and 

 followino'; length very slowly decreasing after about the fiftieth, the fourteenth 

 from the distal end (root) and following being about as long as broad ; last seven 

 or eight with the articulations slightly swollen; periphery of the articular faces 

 finely marked with radiating lines except at the ends of the tran.sverse ridge; 

 proximal columnars quite cylindrical , the articulations becoming slightly enlarged 

 after the thirtieth ; squarish distal columnars slightly constricted centrally as in 

 the species of i?//4'zocrmH5 which have squarish columnars; radicular cirri stout, 

 but only the bases preserved. The topmost columnars are I mm. long by 

 0.5 mm. in diameter; those in the middle of the stem are 4 mm. long by 1 mm. 

 in diameter, while the squarish ones at the distal end are 2 mm. long; the last 

 seven or eight are 3 mm. long with oval ends the faces of which measure 3 mm. 

 by 1 mm., the two faces of each columnar being approximately at right angles to 

 each other. 



The colour in spirits is white. 



