EROIDEA "I N'ORTH PACIFN AND ADJACENT WATERS M-HI.I: 





the fourth pair slightly separated. The first ti inctlj longer than the 



third, and tli«' i\m> combin I i as l< 



At the inner end "I i > angle are two blunt actinoa spines, and on 



the narrowed actinal surface the two suboral spines arc crowded one behind the other. 

 Actinostome small, sunken, having the general appearai 



Crossed pedicellariae (pi. 11,1 rather numen ned to spinal she 



as noted above. The abactinal are 32 to 34 mm. loi 



- sight pedicellariae of two sorts: R used, lanceolate 



either robust or medium slender) of various sizes, on the adambulacral and oral 

 spines (somewhere around 0.7 mm. long, pi. 11, and numt taller pt 





TBI I IMS V 



- 



■Kiirni 



culate ones at bt me spines; 2) larger toothed pi 11, figs. 3a, 36) in 



intermsrginal and actinal channels and very rarely on abactinal surface l to l 2 



mm. long). Two or tin- if these stand near the genital apertures on the very 



narrow actinal interradial region. 



Madreporic plate 2.5 mm. in diameter, situated at middle of r, at top of axil- 

 lary channel. 



Gonads attached to body wall at base of ray between the Buperomarginal and 

 inferomargina] plates. In one interradius the two genital papillae can be demon- 

 strated just back of the adoral carina 



Cat No 51 M »um of the Academy <>f Sciences, I R. S. S 

 Leningrad. 



