54 



I. urMA. 



36. S. heteractinus, I jirna. 



Ijima (Annot. Zoo]. Jap . vol. I. p. ~>i>). 

 Loc. : Sagami Sea. 



37. S. pleorhaphides, Ijima. 



Ijima (Annot. Zool. Jap., vol. I, p. 58). 

 Loc. : Sagami Sea. 



Rhabdoc.vlyptus, F. E. Sch. 



Paratangential rays of hypodermal pentactins armed with biserially ar- 

 ranged hook-like prongs. 



Artificial Key to Species. 



a'. Autodennalia, pentactins and stauractins ; octaster .'!0 — 



40 ft- in radius R. davsoni. 



a". Autodennalia, predominantly stauractins ; octaster 00 — 



120 /l in radius R. rictor. 



a'". Autodennalia, predominantly straight diactins. 



b'. Octaster 65 — 8S in radius R. mollis. 



b". Octaster smaller, 38 -50 ft in radius R. copillatus. 



38. R. dawsoni (Lambe). 



Batliydorus dawsoni, Lambe (Trans. Koy. Soc. Canada, Sect. IV, 1892, p. 

 73, pl. IV 2 and pl. VI 2— 2k).— Rhabodocalyptu* datosoni, Schulze (Rev. Asc. 

 u. Ross., p. 555). 



Loc. : near Vancouver Isl. 



39. R. victor, Ijima. 



Ijima (Annot. Zool. Jap., vol. I, p. 52). 

 Loc. : Sagami Sea. 



40. R. mollis, F. E. Sch. 



Schulze (Chall. Rep. Hex., p. 155, pl. LXVI). (Rev. Asc. u. Ross., p. 

 552). — Ijima (Annot. Zool. Jap., vol I, p. 50). 

 Loc. : Sagami Sea. 



42. R. capillatus, Ijima. 



Ijima (Annot, Zool. Jap, vol. I, p. 51). 



Loc. : Sagami Sea. 



