A. E. Verrill — Revision Genera and Species of Starfishes. 191 



The species can be distinguished by the larger and more massive 

 marginal plates, which encroach farther upon the dorsal surface, and 

 by the very narrow abactinal areas on the rays. The granulation of 

 the actinal plates is also closer and the adambulacral spines are 

 shorter than in P. intermedius, but the two are very closely related. 

 There is an odd apical spine on the jaws. Actinal fascioles are 

 generally present. 



Pseudarchaster (?) hispidus Ver., sp. nov. 



Plate XXX. Figure 5. 



Pentagonal with moderately long rays. Radii as 1 : 2. 



About twenty-five marginal plates, above and below ; these are 

 rectangular, broader than long, not oblique. The upper ones extend 

 only a short distance on the dorsal surface, and are only a little 

 convex. They are covered with numerous very small, slender 

 spinules; those on the middle are erect, but those on the margins 

 form fascioles of very slender spinules. 



Inferior marginal plates extend far within the margin ; they are 

 spinulated much like the upper ones, but the spinules are larger, 

 longer, tapered, acute, arranged obliquely and divergently in four 

 or five rows, not counting the marginal fascioles ; usually none of 

 the median ones are distinctly larger than the rest, but sometimes, 

 on a few plates, one or two of the distal ones are somewhat larger 

 and longer. 



Abactinal paxillae are relatively large, rounded, and nearly uni- 

 form in size. There is a somewhat distinct median row on the rays. 

 About six rows occur opposite the third pair of marginal plates ; 

 they are reduced to three rows near to the end of the rays, and to 

 one median row between the last three plates. They are uniformly 

 covered with small, sharp, elongated, divergent spinules, often thirty 

 or more in a group. Of these, twenty or more may be marginal and 

 a little smaller than the others, the adjacent ones interlocking so as 

 to conceal the papula?. These appear to be small and few. The 

 plates are round, elevated, convex or somewhat clavate, well sepa- 

 rated. 



Interradial actinal regions are of moderate size, triangular, with 

 the outer plates extending out to about the seventh pair of inter- 

 ambulacral plates. They are in rows parallel with the adambula- 

 crals and not separated by radiating grooves. They are rather 

 large, roundish, covered with rather long, divergent, acute spinules, 

 often nine to twelve on the larger ones. 



