272 NEW STABFISHES AND OPUIURANS—VEBEILL. vol xvii. 



When the spinules are well preserved those of adjacent pseudopax- 

 ilhe are nearly in contact, giving the surface an even and somewhat 

 tessellated appearance. The pseudopaxillse on the sides of the rays 

 form regular oblique rows, diverging downward and outwardc 



The papuhe are large and occur either singly or in groups of two or 

 three in each small interspace between the dorsal plates of the disk 

 and arms; on the sides of the arms they mostly occur singly. No 

 papula? were found below tht marginal plates. Madreporic plate of 

 moderate size, covered with fine, much convoluted gyri Upper mar- 

 ginal plates small, bearing pseudopaxillfe slightly larger than those 

 above them on the basal part of the arms, but becoming much more 

 distinct toward the tips, where the adjacent lateral pseudopaxillse are 

 small. The inferior marginal plates are much larger and somewhat 

 prominent ; the elevated portion is compressed, elongated transversely 

 to the ray, and bears an oblong group of numerous small, crowded 

 paxilliform spinules, similar to those of the dorsal pseudopaxillte. 

 About 55 lower marginal plates occur on each side of a ray. 



The inferior interradial spaces are of rather small size and are closely 

 covered by plates which bear mostly elliptical or oblong paxilliform 

 clusters of small, slender, crowded spinules, similar to those of the 

 marginal i^lates, but larger than those of the dorsal iiseudopaxilhie. 



A row of G or 8 interradial plates, bearing i»axillre, extends a short 

 distance out on the arms between the marginal and adambulacral 

 plates. 



The adambulacral spines are long and slender; in the furrow-series 

 each plate bears a group of 4 (sometimes alternately 3 and 4, or 5 and 

 4) rather long, tapering subacute, somewhat divergent and nearly 

 equal siunes, which stand in a line slightly oblique to the edge of the 

 furrow and are connected together by a web, often extending to half 

 their length in dry specimens and further in alcoholic ones. In alco- 

 holic specimens all the spines are invested in a rather thick mem- 

 brane. Each adambulacral plate bears, also, a transverse series of 4 

 or 5 spines of about the same length as, but somewhat thicker than, 

 the furrow-series; they differ but little in length, but the outermost 

 ones are slightly smaller than the inner ones. 



The jaw-]3lates are large and broad; each pair jointly bears an 

 inwardly directed group of 6 rather stout tapered spines, of which 

 the 4 central ones are largest; each plate also bears a marginal row 

 consisting of 7 or 8 somewhat smaller spines, the innermost ones being 

 the largest; a curved row of 8 or 9 similar spines is borne on the 

 central crest of each jaw plate; those of the 2 rows usually cross each 

 other over the elliptical, naked, intermediate space. 



Off Cape Cod, station 264, in 80 fathoms, 1879 ; off Nova Scotia, sta- 

 tions 85 and 86, 101 fathoms, 1877; also taken by the Gloucester fisher- 

 men on George's and Western Banks, in 45 to 80 fathoms. 



This species is allied to 8. endeca, but differs widely from that species 



