Boone, Critstacea, Cruise of "Alva," 1931 27 



stalks, with the entire margins and tip spinose. The eyestalks are 

 clavate, larger proximally, somewhat compressed laterally, four- 

 fifths as long as the frontal width of the carapace ; the cornea is 

 one-fourth of the total length ; a little longer than the second joint 

 of the antennulae and only reaching midway the distal peduncular 

 article of the antennae. The ophthalmic scales are large, obliquely 

 truncated and spinulose distally. 



The antennal peduncle extends to about midway the distal pe- 

 duncular joint of the antennulae ; the antennal acicule is bifurcate, 

 with the opposed margins of the forks spinulose ; the outer fork is 

 the longer, barely reaching to the base of the distal peduncular 

 joint; the inner fork reaches to about midway the second pe- 

 duncular joint; the flagellum is very slender, about one and one- 

 half times as long as the carapace. 



The chelipeds are markedly unequal, the left being the larger ; 

 both are very spinose and also have their margins very setose. 

 The left cheliped is nearly twice as long as the carapace, the 

 merus, carpus and propodus being of subequal length ; the merus 

 is trigonal, the margins being spinulose or granulose, the outer 

 surface is granulose ; the carpus is triangular, longer than wide, 

 with a sinuous groove, nearly smooth, on the upper surface ; the 

 palm of the propodus is a little higher than long, with the outer 

 surface slightly convex ; the upper finger is one and one-half times 

 as long as the upper border of the palm ; the fingers meeting, with 

 the tips corneous, black. The upper and lower margins of the 

 fingers and palm are distinctly spinose; there is a wide, oblique 

 area on the outer surface of the palm in which spines are scarce 

 or lacking; the spines of the palm are procurved, or claw-like. 

 The upper finger has a double longitudinal row of spines on the 

 upper surface. The smaller cheliped is similarly spinose setose, 

 the setae appearing longer, owing to the smaller sized claw. 



The second and third pairs of legs have the upper lateral mar- 

 gins of the meral, carpal and propodal joints spinose, the outer 

 surfaces granulose; the propodi are fluted, with spines on the 

 upper surface ; the dactyli are long, slender, curved, with a longi- 

 tudinal sulcus on the outer face ; the dactyli are abundantly fringed 

 on their margins with long, silky setae. The legs of the left side 

 are shorter than those of the right side, scarcely exceeding in 

 length the great cheliped, while on the right side, they exceed this 



