A. E. Verrill — Revision Genera and Species of IStarfishes. 22] 



Family PTERASTERID^ Per. 

 Hexaster obscurus Perrier. 



Hexaster obscurus Per., Mem. Soc. Zool. France, iv, p. 267, 1891. Res. Camp. 



Sci., xi, p. 41, pi. iii, figs. 1, la, 1896. 

 Pteraster (Temnaster) hexactis Yervill, Proc. Nat. Mus., vol. xvli. p. 175, 1894. 

 Temnaster hexactis Verrill, Amer. Journ. Sci., xlix, p. 202, 1895. 



There can be no doubt that the genus and Rpecies described bv 

 Perrier is the same as that described by me. Both were from the 

 same region and nearly the same depth. 



The original description by Perrier (1891) Avas overlooked by me 

 when I described the species in 1894. 



Only one specimen was taken by the Albatross, in 57 fathoms, at 

 station 2433, N. lat. 43° 05'; W. long. 50° 43', off Newfoundland. 



It was taken by the Hirondelle, off Newfoundland, in 155 meters. 



Hymenaster regalis Ver., 1894; var. Ag-assizii nov. 



Large, swollen, polygonal, with short rays, and with concave in- 

 terradial areas. The interradial margins are prolonged into a broad, 

 soft web. Abactinal pore small, regular, five-angled, 



Adambulacral spines three in a series, appearing rather stout and 

 club-shaped at tlie tip, in the alcoholic preparation. The whole 

 under side of the body is covered with a thick fleshy membrane. 



The dorsal surface is covered with prominent, regularly arranged, 

 well spaced, slender, acute spines. 



Color, in alcohol : under side deep pink or rose-color ; upper side 

 somewhat paler pink. This species was taken by the Blake Expedi- 

 tion, off Martha's Vineyard, N. lat. 41° 24' 45", in 1242 fathoms, 

 1880. 



Family ASTERINID^ Gray. 

 Marginaster austerus Ver., sp. uov. 



Pentagonal with five short, triangular, subacute rays ; interradial 

 margin incurved. Dorsal surface thickly covered with small and 

 short, rough spinules, on crowded indistinct plates. 



Papulae rather large, solitarj^ between the plates, generally diffused, 

 even down to the margin ; a regular row between the upper and 

 lower marginal plates and just above the lower ones. Ten primary 

 calicinal plates of the disk are larger than the rest and distinct from 

 them ; the interradial most so. Dorsal nephridial pore distinct, sur- 

 rounded by spinules. 



