1901.] NATURAL SCIENXES OF PHILADELPHIA. 175 



80 and 68 mm. respectively, and the proportion of the radii is as 

 two to one. The rays are broader at the base and more tapering 

 than the typical form. As to the adambulacral armature, there 

 are five or six spines in each plate of the longitudinal series and 

 six in the transverse; the former ai-e somewhat webbed at the base. 



From Station 39 one specimen resembles very closely the larger 

 one from Station 49. The other two (60 and 80 mm. in diameter 

 respectively) have longer, more slender and less tapering rays; in 

 this respect coming closer to the typical C. papposus, the proportions 

 of the radii being about 2^-2^ to 1. The longitudinal series of 

 adambulacral plates have each three or four spines to a plate, and 

 the transverse series five spines. In all five specimens the paxillce 

 have longer, more numerous and more divergent spines than does 

 the typical form, 



Danielssen and Koren {I. c, p. 44) discuss the relation of Sohis- 

 ter affinis (Brandt) to Crossaster (Solaster) pap)posus, and Sladen 

 (/. c, p. 4i) describes a form from the Faroe Islands which he 

 calls variety septentrionalis of C. pap)po-su!^, while Duncan and 

 Sladen, in the report of the Echinoderms of the Nares Expedition,^ 

 mention the variations from the type form in their specimens of C. 

 papp)osus. The present specimens agree with these cited descriptions 

 in the number of the rays (10), but otherwise there are minor 

 deviations from them all, 1 am inclined to think that all are 

 merely local varieties of an extremely variable species. 



Distribution. — Widely distributed over the whole north area of 

 the Atlantic; Arctic and Sub- Arctic: Massachusetts, Newfound- 

 land, Discovery Bay and Franklin Pierce Bay (Nares Ex.), 

 Assistance Bay (Penny's voyage), Iceland, British and north 

 French coasts, Faroe Islands, Scandinavia, Finmark, Murman 

 coast, Spitzbergen, Barents Sea, Nova Zembla, (?) Bering Straits 

 (C. affinis Brandt). 



10. Solaster endeca (Retzius). 



Asterias endeca Retzius, K. Yet. Akad. Haudl. Stockholm, IV, p. 237, 



1783. 

 Solaster endeca Forbes, ]\Iem. Werner Soc, VIII, p. 121, 1839. 



Station 39. Granville Bay, 30-40 fathoms. 1 specimen. 



A single nine-rayed specimen, diameter 30 mm. 



Distribution. — North coast of North America, Greenland 



(dredged at 30 fathoms) (Nares Ex), Iceland, coast of Great 



* Annals of Nat. Hist. (4), XX, p. 457, 1877. 



