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



Disk S inin. Anal funnel 1,5 nun. Mouth and anus subeentral. 

 Colour dark brown, regenerated parts white. 



Sp. 2 (St. 59) Cd. 3 mm., pentagonal, flat dorsal pole 2 mm. 



C. XX\^ 15—19; 9—11 mm. The 4*"— 5"> segments are the long- 

 est L = 1 ^ji br, 6*'' segment a little shorter, a transition segment. 

 After this (as in sp. Ij highly polished segments. 



The arms are XIII, 55 mm. Syzygies with an interval of 4 — (5 

 oblique articulations. 



P, 38 (19—22 T) 9 mm., P, 30 (± IS T) 7,5 mm., Pg 17; 4,5 mm. 

 and Pg 15; 4 mm. without combs, but with dorsal hooks and as in the 

 preceding p. with small spiny knobs on the outer side of the proximal 

 segments. Distal p. 19: <> mm. The (5 last segments with dorsal hooks. 

 The segments somewhat longer than broad, with spiny borders. — 

 Disk 6,5 mm. 



Sp. 3 (St. 53) C. XXIII 15— l(j (D), 17 — 18 {\), 7—9 mm. The 4"' 

 and 5* segments longest, L = 2 X br. From the 5"' segment a dorsal 

 transverse crista. 



The arms X. 40 mm. +. Syzygies Avith an interval of 5 to 6 

 oblique joints. Axillai-y h = '/2 br. 1 Br 1 h = ^'5 br. Primipostaxil- 

 laries free inside. 



Pi— P, with a comb. P^ 30 (18 T) 5 mm., P, + 13 T, a little shorter. 

 P3 and P^ with still shorter combs, P5 II; 3 mm. Distal p. 13; 5 mm. 



Disk 5 mm. Mouth subeentral. 



The base (tf the arms tolerably smooth. Synarthrial tubercles unim- 

 portant. The arms as in the ])receding specimens rather coarse. 

 Distal Br-segments a little overlapping, not bent outwards, with spiny 

 borders. 



The specimens agree with those of Carpenter and Clark except 

 that the joint between Br 1 and 2 is of a synarthrial not of a syzygial 

 nature and that the proximal pinnules are somewhat shorter. 



Nova Acta Reg. Soc. Sc. Ups, Ser. 4, Vol. 5. N:o G. Impr. '•••2 1922. 



