The Crinoids from Dr. 8. Bock's Expedition to Japan 1914. 37 



Comaster serrata A. II. Clahk. 



Fig. 21—25. 



Syn.: Coniafida scy)-((f(t 1907 A. II. Clark Proc. U. S. Nat. Mas. Vol. 3^, 

 1). 154. ' 



Comaster scrrafa 1908 A. II. Cl.vek Proc. U. S. Nat. Mus. Vol. 33, p. 686; 

 1912 Clin. liul. Oc. p. 89; 1915 Journ. Acad. Sei. Vol. 5, p. 214; 1918 Siboga 

 Exp. 42 B, p. 37. 



Comasier parvicirra 1908 A. H. Clark Proc. U. S. Nat Mus Vol. 34, p. 306. 



From St. 45 (1 sp.) 55 (1), 59 (1) = 3 specimens. 



Sil. 1 (St. 59) Cd 2,2 mm., free dorsal pole I mm. C. XVII, 

 10 — 11; 5 — 7 mm. in a single or double whorl; P' segment sliort, 2^* 

 strongly hour-glass-shaped L=lV;2Xbr; 3'^ L = 3 X br, 4"' somewhat 

 shorter L = 2 V 2 X br. 5"' segment a transition segment. Dorsal spine 

 small, indistinct, on the distal part of the segment. Penultimate seg- 

 ment L = br with opposing spine; h of this one about = V^ X the br of 

 the segment. Terminal claw L = + 2 X the preceding segment, strongly 

 curved. 



R — s concealed. I Br 1 h = V4 X br, partly hidden by Cd. I Brax 

 h = Vi3 X br, almost triangular. A syzygy between L Br 1 and 2. All 

 the way from I Brax the margins of the segments are distally bent 

 outwards and very spiny. II Br:s are 4, 111 Br:s 2 (1 + 2). Arms 

 XXVIII 50—70 mm. Br: 1 + 2 except when the arm originates from 

 a I Brax: then occurs Br 1—2 3 + 4. Br 1—7 discoidal, then oblique 

 joints. 16 segments pr cm. (12 if the syzygial pairs are counted as 

 units). The breadth of the arms 0,7 mm. Segments distally: L = li/2X 

 br, slender, hour-glass-chaped. 



I 1+2 



Br 1—2 3 + 45 



II 1-2 3 + 4 



III 1+2 



III 1 



[Br 1+2345.. 

 iBr 1 + 2345.. 

 iBr 1 -f 2 3 4 5 . . 



2 



iBr 1 + 2 3 4 5 ... 10 + 11 . . 14+15 . . 18+19. 



