280 ^EW STARFISHES AND OPHIURANS—VERRILL. 



derstand why Sladen should have referred it to Freyella, unless by 



inadvertence. 



BRISINGA COSTATA, Verrill. 



Brisinga eosfata, Verrill, Amer. Journ. Sci., xxviii, p. 382, 1884. 



The original type from station 2210, in 991 fathoms, has the following 

 characters : 



The disk is firm, round, roughly spinulose, the spines small, sharp, 

 standing singly or in groups of two, three, or more. Interradial plates 

 nearly concealed, the exposed part verruciform. Madreporic plate 

 moderate, with many radiating gyri. Arms very long, strongly de- 

 pressed, somewhat swollen toward the base, but broad and angular 

 and carinated farther out, gradually tapering. The basal portion is 

 crossed by 20 to 25 curved or sinuous, very prominent, strong, narrow 

 ribs, or carina, some continuous and some interrupted, and surmounted 

 by a simple row of small, short, acute spinules. Smaller transverse 

 raised bands of pedicellarise and small spinules alternate with the ribs. 

 The adambulacral plates bear usually three, or alternately two and 

 three, slender, fluted, glassy spines in a transverse row at about the 

 middle of the plate. The two actinal ones are longer and larger than 

 the other, which is small, nearly erect, and situated on the proximal 

 angle. In addition to these there is a smaller, more slender, inner fur- 

 row-spine, situated at the distal end of each plate and projecting hori- 

 zontally more than half-way across the groove. Sometimes on alternate 

 plates there are two of these transverse spines toward the base of the 

 arms. The outermost large spine on alternate segments stands raised on 

 a tubercle on a separate lateral plate, which appears to become consoli- 

 dated with the adambulacral plate on the distal half of the ray. The 

 alternate lateral plates are elongated, radially narrow-oblong, spineless, 

 and in contact with the adambulacral plates. These lateral plates agree 

 nearly with the adambulacral in number, but not in length. All the 

 spines are sharp and bear swollen sheaths covered with minute pedi- 

 cellarise. 



The jaws bear, on each half, a slender transverse spine on the inner 

 angle and a large one on the outer angle ; sometimes the two outer ones 

 are consolidated into a single larger median one. The adoral end is often 

 without spines, but sometimes bears one small spine on each half or 

 one on one side directed orally. The lips close to the mouth are slightly 

 verrucose. 



Diameter of disk, 28 mm. ; breadth of arms, near base, 11 mm. ; length 

 of longest spines, 12 mm. 



Station 2210, in 991 fathoms (No. 7820, U. S. N. M.). It was also taken 

 at station 2533, in 828 fathoms, and at station 2734, in 841 fathoms, a 

 single specimen at each locality. 



BRISINGA MULTICOSTATA, new species. 



Rays 15 in the type specimen. Disk 27 mm, in diameter when 

 dried ; round, flat, densely covered with small, rounded, convex plates, 



