Boone, Crustacea, Cruise of "Alva," 1931 59 



ess that fills the orbital sinus and terminates distally in a tooth-like 

 process that lies between the orbital teeth. The second antennal joint 

 arises above the base of the antennal tooth and is quite small, the 

 flagellum is fine and is about twice as long as the long diameter of 

 the orbit. 



The external maxillipeds are smooth, close-fitting, with a brush of 

 fine setae along the inner margin of the ischium and merus. The 

 distal margin of the merus is a little oblique. 



The chelipeds are equal in the large male under discussion, with 

 the merus triquetral, its anterior lateral margin armed with three 

 coarse, well separated, triangular teeth, the series increasing in size 

 from proximal to distal. The carpus has its inner angle produced to 

 a very long acute, spine-like tooth, which points obliquely forward 

 and is equal in length to one-half of the length of the carpus; the 

 outer and upper carpal surfaces are channelled, a heavy carina border- 

 ing the outer margin and two toothlike carinae above this near the 

 distal end. The palm is high, moderately rounded, with three well 

 spaced, heavy longitudinal carinae, the lower and median of which 

 extend upon the lower finger for the greater part of its length, 

 while the upper carina terminates in a node at the base of the upper 

 finger and above a larger node. Just above the base of this upper 

 carina is a strong, pointed tooth. Midway between the upper carina 

 and the upper margin there are two more strong pointed teeth, one 

 at the distal border and the other well spaced behind it, about midway 

 the length of the palm. The upper lateral margin of the palm has a 

 blunt node proximally and a strong curved tooth midway its length 

 and another similar tooth subdistal. The upper finger is strong, 

 curved, its tip overlapping that of the lower finger, its cutting edge 

 armed with a large molar and several smaller teeth, its upper and 

 outer surfaces striated by three deep longitudinal grooves. The 

 lower finger has its cutting edge armed with four large and several 

 smaller teeth and its tip upcurved. 



The second, third and fourth pair of legs are moderately slender, 

 the carpus, propodus and dactyl of each having a longitudinal sulcus 

 on both lateral surfaces. The fifth pair of legs are natatory, with a 

 strong, subdistal spine on the outer lateral margin of the merus; the 

 carpus is short, thick, the propodus and dactyl are widely expanded 

 and rounded. There is one longitudinal sulcus on the propodus and 

 two on the dactyl. 



