134 FISHER 



about one half length of innermost ; thence series is continued 

 to end of plate in 7 or 8 much shorter spines resembling those 

 of first adambulacral plate. All spines skin-covered and united 

 basally by a web. On actinal surface, parallel with median 

 suture and slightly nearer it than free margin, is a comb of 2 to 8 

 skin-covered sometimes basally webbed spinules similar to but 

 smaller than corresponding series of first inferomarginal. 



Madreporic body irregularly circular or oval, situated about 

 midway between center of disk and margin ; convex, irregu- 

 larly and centrifugally striated ; about 3 mm. in diameter. 



Color in life: " salmon pink." 



Young : Young specimens agree very well with the large ex- 

 amples, except that the papulae are less numerous, and there is a 

 slight reduction in number of spines of interradial, marginal 

 and adambulacral plates, as well as fewer itnerradial and mar- 

 ginal plates. In small specimens there is more often only one 

 superomarginal plate interpolated between the transversely 

 oriented inferomarginals, and the former are slightly more 

 superior in position, at base of ray, than in adults. Adambu- 

 lacrals commonly with 3 to 5 furrow spinules proximally, and 

 about 5 actinal. Usually only 1 or 2 large papulae to a mesh ; 

 abactinal spinelets not fewer in number than in adults. 



Type, No. 21932, U. S. Nat. Mus. Type locality, Albatross 

 Station 2839, Santa Barbara Islands, Cal., in 414 fathoms, on 

 gray sand. 



CROSSASTER BOREALIS Fisher, new species. 



Rays 9 to 12. R = 140 mm.; r = 47 mm. R = 3?'- 

 Breadth of ray at base, 23 mm. 



Related to C. australis Perrier. General form much as in 

 preceding species, but disk usually more arched, and commonly 

 slightly sunken in middle ; marginal plates prominent, paxilli- 

 form, transversely oriented, spaced ; not of two kinds as in the 

 preceding species ; situated on margin of ray and disk, not 

 proximally encroaching on actinal surface to any great extent; 

 interradial areas small, paved with small roundish close-set 

 plates bearing very few spinelets ; a single series of small scat- 



