Boone, Crustacea, Cruise of "Alva," 1931 77 



triangulate, with a deep groove in the medial dorsal line, the apex 

 very acuminate. The lateral telsonic margins are setose, and on 

 their distal half bear three pairs of small, subequally spaced, arti- 

 culated spines, in addition to a fourth distal pair, one on each side, 

 of the telsonic apex and about twice as strong as the preceding 

 lateral pair of spines. 



The eyes are set on short stalks, each of which bears on the 

 proximal dorsal surface a small calcareous plate which has the 

 proximal part rounded at the outer side and is produced into an 

 acute slender triangle on the distal portion and apex. The cornea 

 are large, reniform. 



The antennulae have the first article produced from the inner 

 proximal angle into a narrow stylet-like process which is very 

 slender and acuminate ; this first article is excavate to protect the 

 eye ; the second and third articles are strong, successively smaller ; 

 the third article extending one-half its length beyond the rostral 

 tip ; the fiagellum is two-branched. 



The antennae have the first article with the distal margin 

 smooth, without a spine ; the scaphocerite is about one millimeter 

 longer than the antennular peduncle, with the outer lateral margin 

 thickened, terminating in a subdistal tooth, the distal margin 

 rounded unequally from the spine to the almost angle of the distal 

 inner margin; the margin is convex on the proximal third but 

 rather oblique on the distal two-thirds and ciliated. 



The external maxillipeds do not bear an epipodite. 



There are epipodites present on the first, second, third and 

 fourth pairs of legs ; these epipodites are well developed. There 

 are no epipodites on the fifth pair of legs. 



The first, second and third pairs of legs are chelate, each with 

 an antrorse spine present at the inner ventral distal angle of the 

 basal joints. The third pair of legs is the longest, reaching, in the 

 adult male, to about one-half to three-fifths of the length of the 

 scaphocerite. In a female of the same size, this third pair of legs 

 has the same length ratio. 



The ischial joint of the third leg of the adult male is produced 

 in an unequal-sided, triangulate tooth, apex of which is slightly 

 curved over, inward, the tooth being situated not far from the 

 proximal end of the joint, which is slightly hollowed, or concave, 

 at the proximal side of the base of this tooth. 



