50 BULLETIN OF THE 



OPHIOPEZA Peters. 

 Ophiopeza aster sp. nov. 



Plate XIV. Figs 395-397. 



Special Marks. — Disk densely and finely granulated above and below, in- 

 cluding the mouth-angle. 



Description of an Individual (Station 142). — Diameter of disk, 11 mm. 

 Length of arm, 33 mm. Width of arm close to disk, 2 mm. Teeth narrow, 

 sharp and lanceolate ; the two lowest usually split in two. The apex ia occu- 

 pied by a bunch of three or four short, crowded, spiniform tooth-papillse ; and 

 on each side of the mouth-angle is a close line of small mouth-papillae, whereof 

 the inner ones are bead-like, while the two outermost are wider and somewhat 

 flattened. The small, rounded mouth-shields and the. side mouth-shields are 

 completely covered by a close granulation. First under arm-plate about half 

 as large as those beyond, of a heart-shape, with the point inward ; the rest are 

 rather small, somewhat broader than long, much wider without than within, 

 having the outer side curved, lateral sides re-enteringly curved and a truncated 

 angle within. Side arm-plates small, clinging close to arm, widely separated 

 above, nearly meeting below. Upper arm-plates four-sided, twice as broad as 

 long, much wider without than within, with outer side gently curved and lat- 

 erals straight. Disk pentagonal, flat, densely and uniformly covered with an 

 extremely fine granulation, 20 or 25 grains in the length of 1 mm. ; this gran- 

 ulation extends over the entire mouth angle quite to the bases of the mouth- 

 papillae. Six very short arm-spines, growing longer from above downward ; 

 the upper ones are rounded and peg-like ; the lowest ones somewhat flattened, 

 and scarcely more than half as long as a joint. One oval tentacle-scale. Color 

 in alcohol, light greenish gray. 



Station 142, 150 fathoms, 6 specimens. 



OPHIOTHRIX Mull. & Trosch. 

 Ophiothrix aristulata sp. nov. 



Plate XV. Figs. 481-484. 



Special Marks. — Ten moderately stout, feebly thorny, scarcely tapering arm- 

 spines. Disk, except the large radial shields, densely set with short, slightly 

 rough spines. 



Description of an Individual (Station 142). — Diameter of disk 14 mm. 

 Width of arm near disk 3 mm. There are about thirty tooth-papillae which 

 are pointed, and are arranged, as usual, in a vertical oval, the exterior line on 

 either side composed of ten or eleven longer ones, while a similar number of 

 shorter ones, arranged in twos at the centre, and in a single line above and be- 

 low, fill closely the middle space. Three short, thick, squarish teeth. Mouth- 



