The Crinoids from Dr. S. Bock's Expedition to Japan 19 U. 23 



Comissia parvula A. il. Clakk. 



Fio-. ll>— 14. 



Syn.: Coiiiissid parnda 1912 A. II. <"lai;k Proc. Piol. Soc. Wasliiiigton. 

 Vol. 2Ö,' |). 11); lUlS A. H. Clark Sibogii Exp. Bd 42 B. p. 23. 



From St. 4 (I s]>.), S (1), 30 (1). 37 fl) = 4 specimens. 



Sp. 1 (St. 37) C(l discoidal, 2.5 mm., free part 1,5 mm. 



C. XXI 10 — 13; <'),o — S mm. in a partly double whorl. 1"'' seg- 

 ment shorter than long, 2'' L = l'/2 br, 3'' longest and narrowest 

 L = 3 X br, 4*'' segment L = 2 bi-, 5"' and the following ones broader 

 and shorter L= Vjï br. Antepenultimate segment L about = I'/s br. 

 A small dorsal knot from about the 5"' segment. Opposing spine in- 

 conspicuous. Terminal claw curved, pointetl, somewhat longer than 

 the preceding segment. 



R — s concealed. I Br 1 slightly visible, narrow bands^ h about 

 '/6 X br. Axillary low pentagonal or triangular, h = ^2 X br. Br:s 1 al- 

 most free inside. Br 2 about twice as broad on the outer side. After Br 

 7 or S oblique articulations. Distal segments smooth, not overlapping. 

 Syzygies for ex: 3 + 4 . . 11 + 12 . . 14 + 15 . . 18 + 19 . . 22 + 23 etc. 

 with an interval of 2 to 3 oblique articulations: 15 segments pr cm. 

 /11 if the syzygial pairs are counted as units). Arms X, 45 — 50 mm. 

 The breadth of the Br:s at the middle parts of the arms about 1 mm. 

 The longer side of the distal segments = br. 



Pi-P., with a comb. Pi + 30 (9-10 T) 7 mm., P., + 20 (9 T) 

 mm., P3 + 25 (9 T) 4,5 nnn. with a genital gland to the 4"' segment. 

 The height of the teeth about = the br of the segment, P^ 13; 4,2 mm. 

 3 to 4 last segments with dorsal prominences. Broad, coarse seg-' 

 ments, the most proximal ones notched on the distal side and some- 

 what widened in the distal part, by which the bases of the pinnules 

 somewhat resemble those of Compsometra serrata. Distal p. 17; 5,.-. mm. 

 The bases of the pinnules from P.; to P.^,, swollen by gonads. 



Disk smooth, 5,5 mm. Mouth central. 



Sp. 2 (St. 30) Cd 2,5 mm., free dorsal part 1,5 mm. C. XXII 12; 

 5 mm. (only one cirrus left) in a single whoi'l. 3'' segment longest 

 L = 3',;2 br. Distal segments laterally compressed and shorter. Ante- 

 penultimate segment a little longer than broad. 



