78 NATURAL HISTORY BULLETIN 



ularly placed. The papulae are large, all dorsal, and arranged in 

 rows. 



The superomarginal plates correspond with the lower ones; 

 each bears a marginal series of three or four flat, lanceolate 

 spinules. 



The inferomarginals are five on each side of a ray. They 

 are rectangular, broader than long; each bears a marginal row 

 of four or five flat, lanceolate, acute, hyaline spinules, forming a 

 marginal fringe of spines. 



The jaws are triangular, of moderate size, not prominent. Each 

 half bears an angular peroral spine, four lateral spines, and two 

 or three epiorals. 



The interactinal plates form a triangular area; three larger 

 ones stand in an impaired median row, running from the jaws 

 to the median interradial suture ; one small plate intervenes be- 

 tween the second interradial marginal plate and the third 

 adambulacral, a larger plate lies between the third marginal and 

 the fifth adambulacral. A series of three plates, the middle one 

 alone well developed, runs from the suture between the first and 

 second, and that of the sixth and seventh adambulacrals ; the last 

 plate lies between the sutures of the second and third marginals 

 and that of the eighth and ninth adambulacrals. Some of these 

 plates bear a single spinule ; most are without spinules. 



Perrier refers to the type specimen as "unique" (1884, p. 230, 

 foot note). He states that it was accidentally irregular, which 

 was the case in the type seen by me. The only locality given 

 was the Blake Station 32, in 95 fathoms, N. lat. 23° 52'. 



PORANIA (?) AUSTERA Vcrrill. 



Marginaster austerus Verrill, Eevision Genera Starfishes, Trans. Conn. Acad. 



Sci., vol. X, p. 221, 1899. 

 Porania ? austera Verrill, Ann. and Mag. Nat. History, vol. xiv, p. 20, 1914c. 



Plate iii ; figures 1 — la. Plate xi ; figures 6 — Qa. Details. 



Body flat below, swollen above, with short, thick, rapidly tap- 

 ered acute rays. Radii of the type 11™™ and 17™™ ; ratio, 1 :1.6 ; 

 marginal spines eleven. "Whole surface covered with a rather 

 thick dermis which conceals the outlines of all dorsal plates and 

 most of the ventral ones, except the interactinals. 



