The Ckinoids from Dr. S. ISock's Expedition to Japan l!»U. I7I{ 



mm.; last 5 mm:s with rudimentary p — s. The new arms on the inside 

 of III Brax very short, about 1 mm. (the main arm from tlie same III 

 Brax 5 mm.) An outer ramification in one ease shorter, tiiough witli 

 normal pinnulation, elsewhere always shortei' branches on the inside. 

 Example of arm-branching: 



Pi (to the right on I Br 2 in 4 cases) 9; 4,5 mm. P., 9; P., 10; 

 Pg 10; 5 mm. 



Disk 2 — 3 mm. in diameter with calcareous plates. No orals. 



Sp. IS (St. 58) 3 nodals without cirri. Full number of inter- 

 nodals in the 4*'^ internode. Interarticular pores to the 7"' internode. 



Cirri 32 (VI) 21 mm., 30 (VIII) 19 mm. 4"' segment cubical. 



I Br— s 7 (1 + 2, 4 + 5:3 cases; 1 + 2, 3 + 4:2 cases) 5 cases; 

 8 mm. II Br— s 9 (3 + 4) 4 cases. 11 (3 + 4: 4; 2 + 3: 2) 6 cases; 

 8 — 10 mm. Ill Br — s 11: I case, 13: 7 cases, 15: 2 cases. 17: 7 cases, 

 18 (3 + 4) 1 case, 19: 2 cases, everywhere the syzygies 3 + 4; 8 — 12 

 mm. Arms XL. total L 55 mm. Kudimentary p — s on the last 12 — 

 15 mm. 



Pj (to the right (in I Br 2 in 4 cases) II; 7 mm. P., 11; 5 mm. 

 Br — p. 9; 5 mm. 



To this species pi-obably also l)elongs Sj/. 19 (St. 9| 3 nodals w ith- 

 out cirri. Full number of internodais in the 0"' internode. Interarticular 

 pores to the 10"' internode. The segments are rounded with a slight 

 ring-ridge. Distally of the fixing point for the ciii'al there is a slight, 

 swollen ridge effaced at the middle. The ('irrus-s(tcket extends up 

 over the distal part of the supranodal but does not reach the infra- 

 nodal joint. 



Cirri 43 (XI) 45 nun.. 40 (X\'lll| 4(1 niu!. Extending over 2— 

 2 V^ intern odes. 



B — s 1,8 X 3,7 nun., laterally not contiguous, except on (he super- 

 numerary side. There are 6' R— s. 



I Br— s 4 (1 + 2) or 1 +2 34+; the other ones bi-oken in the 

 P' syzygy. 



