134 BULLETIN OF THE 



covered above and below with minute granules, about a dozen in the length 

 of a mm. In lower interbrachial space on the side mouth-shield next the 

 genital opening are three minute grain-like papillae. Radial shields small, 

 partially covered by granulation, closely joined, much rounded within ; just 

 outside them is a row of large granules. Genital opening long, extending from 

 side of mouth-shield to edge of disk ; genital scale hidden by granulation. Two 

 short round tentacle-scales on the second under arm-plate ; beyond, only one. 

 Three very short, blimt, pointed arm-spines, arranged evenly along the outer 

 edge of the side arm-plate. Color in alcohol, white. 



Station 173, off Matuka Bay, Fiji, 300 fathoms, 1 specimen. 



Ophiopyren longispinus sp. nov. 



riate ^^I. Figs. 176-178. 



Special Marks. — Three slender arm-spines, as long as an arm-joint, ilouth- 

 shields wide heart-shape, broader than long. 



Description of an Individual * (Station 33). — Diameter of disk 4.5 mm. 

 Width of arm, without spines, close to disk 1 mm. Fifteen or sixteen mouth- 

 papillae to each angle, of which the outer one, on either side, stands on the side 

 mouth-shield, is larger than and separated from the others, and is sharp and 

 curved ; the rest are small, squarish, and close, except the one at the apex, 

 •which is sharp and longer. Mouth- shields broader than long, three-sided, outer 

 edge straight, lateral comers much rounded, and an angle inward ; length to 

 breadth .8:1. Side mouth-shields squarish and large, widely separated by 

 mouth-shields, similar in form and position to the side arm-plates beyond. 

 First under arm-plate small triangular, with an acute angle inward, and outer 

 edge slightly curved ; second plate four-sided, wider without than within ; 

 third plate as long as broad, much wider without than within, haraig outer 

 corners rounded. All the plates are apparently composed of two pieces, — an 

 inner, which has a sharp angle outward, and an outer, which comprises the rest 

 of the plate. Side arm-plates broad, not swollen, meeting neither above nor 

 below. Upper arm-plates wider without than within, considerably arched, and 

 ■with outer corners prolonged in small peaks. Disk round and thick, covered 

 above and below with very minute granulation, 15 or 20 grains in the length 

 of a mm. Radial shields small, of a rounded pear-seed shape, nearly or quite 

 joined, and to be seen only when the granulation has been removed. Genital 

 openings extending from outer edge of mouth-shield to margin of disk. Geni- 

 tal scales hidden by the skin and granulation. On the interbrachial edge of the 

 side mouth-shields are four slinrt rounded papilUe. Three long, very delicale, 

 pointeil arm-spines, the middle one a little the longest, upper and iinder spine 

 of about the same size, and about as l(jng as an arm-j(tint. One long pointed 

 tentacle-scale on each of the first pair of tentacle-pores ; beyond there are two, 



• The description is from a specuueii largiT than the one figured. 



