The CßiNoms from Dr. S. Bock's Expedition to Japan 101+. 49 



Comanthus (Vania) annulata (Bell). 



Fig. ;J7-40. 

 Syn: See 19l8 A. H. Clark Siboga Exp. Vol. 42 B, p. 53. 

 From St. 42 A = 1 specimen. 



Sp. 1 Cd tlattened, 4 mm. Dorsal pole 3 mm. C. XV 15; 9—10 

 mm. in a single whoi'l. P' and 2'^ segment shorter than long, 3'^ seg- 

 ment cubical, 4"' and the following ones longer, a little hour-glass- 

 shaped, 6"' segment the longest, L = iV2 X br. Fi'om 7"^ or 8"' segment 

 a weak and indistinct dorsal prominence. The L of distal segments = 

 ^ 3 X br. The cirrus in the distal part somewhat pressed together and 

 in lateral view somewhat thickened. The terminal claw short, coarse, 

 a little longer than the penultimate segment. Cirri weak, small. 



R — s somewhat projecting at the corneis. 1 Br 1 laterally fused 

 with each other, distally broader, h = i .j X br. I Brax low pentagonal, 

 h = \3Xbr, laterally united as usually also II Br : s 1. Primipostaxil- 

 laries fused inside. Bases of the arms smooth. The branches of the 

 arms close together. Syzygies 3 + 4, 11 + 12, l(j+17 etc. with an 

 interval of 4 oblique articulations. Br 1 — 7 discoidal, then oblique joints. 

 11 Br— s:4 (3 + 4), III Br— s : (3 + 4). Arms XL SO- 120 mm. dimor- 

 phous. Distal segments slighily thickened at the distal ends. 14 Br- 

 segments pr. cm. (II. if the syzygial pairs are counted as units). The 

 bi'. of the arms proximally 2,5 mm., distally I mm. or less. 



P„ + 50 (0— 8 T) 16 — 18 mm., P,„ 45 (5— T) 12 mm., Pj ± 35 

 (7 T) 10 mm. P. + 20 (7 T) 6 mm., sometimes without a comb, P3 with 

 or without a comb. Teeth then on every second or third pinnule to 

 P,!- Distal p. + 20; 8 mm. (P' and 2'^ segments short, the rest longer 

 than broad, the last 4 to 5 segments with dorsal hooks). The bases 

 of the p. rather smooth. 



Disk 20 mm. Anal funnel central. Mouth interradial. Coloui- (in 

 spirit) grey-brown. The shorter, posterior arms coarser, their p. often 

 without ambulacral furrow. 



Nova Acta Reg. Soc. Sc. Ups., Ser. 4, Vol. 5. N:o G. Ijnj.r. =»/2 1922. 



