Boone, Crustacea, Cruise of ''Alva," 1931 127 



lateral border is widely rounded, much longer than the postlateral 

 margin and appears to be unbroken, but microscopic examination 

 proves it to be cut into four wide truncate lobes, indicated by shallow 

 suture lines. The entire dorsal surface is covered by numerous solitary, 

 upstanding bristles and beneath these with numerous coarse rounded or 

 conical granules, of unequal sizes, which are more abundant on the 

 outer margins and especially so on the anterior region of the cara- 

 pace, where they increase in size and become more sharply conical. 

 These tubercles are arranged in small oval groups, the group not ele- 

 vated as a lobule and a bit irregular, well separated by wide non- 

 granular channels, which are not depressed grooves but are clearly 

 defined and are devoid of setae. The male belt is triangular, com- 

 posed of five articles, the third, fourth and fifth articles being fused. 



The eye is small, with restricted visual range. 



The antennulae are stocky and fold transversely within the fos- 

 sett, the interantennulary septum is wide. 



The antennae have the basal peduncular article short and wide, 

 almost squarish, with the inner distal angle slightly produced, touch- 

 ing the deflected frontal border ; the outer distal angle not quite reach- 

 ing the orbital angle; the second and third articles are greatly re- 

 duced, the flagellum fine, extending scarcely one-third the long 

 diameter of the orbit. 



The external maxilliped are closefitting, smooth, the merus squarish 

 with the distal margin nearly straight, except for the truncated inner 

 angle. 



The chelipeds are about equal in this male specimen, with only 

 the tip of the merus showing beyond the carapace ; this small meral 

 surface and the entire upper and outer surfaces of the rounded carpus 

 and propodus are covered with numerous coarse conical granules inter- 

 spersed with long bristles ; on the outer surface of the palm they tend 

 to form approximate longitudinal rows. The fingers are not over two- 

 thirds as long as the palm, blackish brown, the upper finger granulosa 

 for the proximal half of its length ; both fingers longitudinally grooved, 

 with the rounded tips meeting. 



The ambulatories are short, each with the meral, carpal, and 

 propodal joints wide, laterally compressed, coarsely granulose on the 

 setose upper surfaces, especially so along the upper lateral margins; 

 the dactyli are stocky, compressed, cylindrical, setose and granulose 

 with sharp, curved tips. 



