The Ceinoids from Dr. S. Bock's Expedition to Japan I!H4. 23 



Comissia parvula A. IF. ('i,ai;k. 



Fig. 12—14. 

 Syn.: Coiiii^siii 2>">'>'"l<i 191^ A. II. Cluik Pioc. Hiol. Sof. Wasliiiigtoii. 

 Vol. 2.")." p. 19; 1918 A. H. Clahk Siboga Exp. 15(1 42 B. [.. 2:1 



From St. 4 (1 sp.). S (1), 36 (1). 37 (1) = 4 speL-imens. 



Sp. 1 (St. 37) ('(1 (li.'^LM)i(lal, 2,:, inm.. fi'ec pai-t I,.:, nun. 



C. XXI 10 — 13; (),.-,— S nnn. in a partly double whorl. 1''' seg- 

 ment shorter tlmn long. 2'' L = l'/2 br, 3'^ longe.st and narrowest 

 L = 3 X br. 4"' segment L = 2 br, 5"' and tlie following ones broader 

 and shorter L= 1 '/^ br. Ante})enultimate segment L about =1'. 5 br. 

 A small dorsal knot from about the 5"' segment. ()]iposing spine in- 

 conspicuous. Terminal claw curved, pointed, somewhat loiigei' than 

 the preceding segment. 



R — s concealed. I Br 1 slightly \isible, nai'row bands^ h about 

 Ve 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; 1.1 segments pr cm. 

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

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

 The longer side of the^ distal segments = br. 



P, — P3 with a comb. P, + 30 (9 — 10 T) 7 mm., P, + 20 (9 T) 

 (i mm.. P3 7(3 25 (9 T) 4.5 mm. with a genital gland to the 4"' segment. 

 The height of the teeth about = the br of the segment, Pr, 13; 4.2 mm. 

 3 tf» 4 last segments with dorsal prominences. Broad, coarse seg- 

 ments, the most proximal ones notched on the di.stal side and some- 

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

 somewhat resemble those of Compsomeira serrata. Distal p. 17; 5..-. nmi. 

 The bases of the pinnules from P, to 1\,, swollen by gonads. 



Disk smooth, 5,5 mm. Mouth central. 



Sp. 2 (St. 30) Cd 2..-. nnn., free dorsal part 1..^ mm. i\ Wll 12: 

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

 L = 3V'2 bi'. Distal segments latei-ally compressed and shorter. Ante- 

 penultimate segment a little longei- than broad. 



