The Crinoids from Dr. S. Bock's Expedition to Japan 1914. 77 



oblique articulations. The Br-seginents rather smooth, 21 segments 

 per em. (IS, if the syzygial i)airs are counted as units). The longer 

 side of the distal brachials, L = - a l)i'. the shorter one L = \;2 br. 



Pi '8; ±5 mm., P., 15 — 10: !» nun. (very much stiffcr and twice 

 as coarse or more than the other p — s. The distal ends of the pin- 

 nulars from the 0"' segment thickened and with a spiny gai'land). P, 

 12; i mm., P^ similar, P.^ always present though often only 2 — 3 mm. 

 Distal p. 17 — 18; 7,5 mm. (distal pinnulars L = 2 — 3 X br). 



Disk incised 8 — II mm. in diameter. Colour white with small 

 brown spots. Anal cone shoit. pointed, 2.5 mm. The distal half of 

 the p. quite violet-brown, the arms lighter with brown spots. 



Differing from C. hella only by somewhat more cirri, which usu- 

 ally have transverse crista instead of a pair of tubercles, and by the 

 primipostaxillaries. which are only united basally. 



Cyllometra A. II. Clark. 

 C. disciformis (P. II. C.\rp.). 



Fi^. 68—69. 



'o 



Aiitedon disciformis 1S88 P. II. C.^rpentek Glial!. Kep. Vol. 26, p. 228. 



Oijllometra disciformis 1912 A. H. Cl.\ric Criii. Ind. Oc, p. 158; 1913 

 Smitiis. Misc. Coll. Vol. 61: 15, p. 31; 1915 Monograph; 1918 Siboga Exp. Vol. 

 42 B, p. 116. 



From St. 12 (1), 33? (1), 35 (1) = 3 specimens. 



Sp. I (St. 35) Cd discoidal, free doi'sal part 2 mm. C. XV 25 

 — 27; 13 — 15 mm. in an almost single whorl. 3'' and 4"' segments 

 cubical, 5''' — 7"' one slightly longer than broad, then shorter again, the 

 distal ones L = ^/s br. The 5"'(or 7"'j to the 12"' segment with a small 

 dorsal transverse ribbon with an excavation in the middle forming an 

 indistinct double tubercle, from about the 13"' segment a simple dorsal, 

 spine, h = '/4 of the br of the cirral. Opposing spine h = '/2 of the 

 br of the segment. Tei-minal claw about as long as the preceding- 

 segment. 



The distal borders of the \l — s visible under the Cd. 1 Br 1 

 h = ^5 br, laterally free. 1 Bra.x h = ^ 3 br. Primipostaxillaries united 



