Boone, Crustacea, Cruise of ''Alva," 1931 133 



cumscribe an elevated, oval lobe on the anterior part of the branchial 

 region. The cervical groove is sharply delineated, the other regions 

 faintly outlined. The anterior half of the carapace is rough with 

 coarse granules, especially along the outer portion where these gran- 

 ules are coarser and more abundant. The posterior half of the cara- 

 pace is nearly smooth. The sidewalls of the carapace, especially the 

 region adjacent to the eyes and buccal cavern, is very granulose. The 

 male belt is composed of five articles, the third, fourth and fifth joints 

 being fused. 



The chelipeds, which are subequal in the male, have the merus 

 short, closely appressed to the carapace, only the upper distal end 

 visible and very roughened; the carpus is rounded, very coarsely 

 granulose, as are also the outer and upper surfaces of the palm; the 

 propodus, including the fingers, is about twice as long as the merus 

 and has the palm three-fourths as high as long with the outer surface 

 swollen, granulose, and channelled by three longitudinal sulci, one in 

 the median line and the other, midway between this and the upper 

 margin and the third sulcus along the upper margin; the spaces be- 

 tween the sulci being rendered ridgelike by the presence of abundant 

 large granules; the fingers are nearly as long as the palm, sharply 

 deflected, slender, the pointed tips, overlapping, the outer surfaces 

 black, coarsely granulose on the proximal half, longitudinally grooved, 

 the cutting edges meeting, each set with a few low, broad teeth. 



The ambulatories are of moderate size, decreasing slightly in length 

 from the anterior to the posterior pairs ; each with the merus, carpus 

 and propodus stocky, laterally compressed, the distal two-thirds of the 

 propodus roughened with granules, the dactyl stocky, tapered, with a 

 series of setae on each lateral margin; the tip long, curved, golden 

 yellow. 



The eyestalk is short, thick, calcareous, constricted below the cor- 

 nea and with a rounded calcareous process on the dorsal surface of the 

 cornea. The cornea is hemispherical, terminal, with a fairly large 

 orbit. 



The antennulae are large and fold transversely within the fossett; 

 the interantennulary septum is slender. 



The antennae have the basal peduncular article rectangular, its 

 distal end reaching to the orbital hiatus ; the second and third pedun- 

 cular articles are greatly reduced; the flagellum short, tapered, 

 slightly over half the length of the long diameter of the orbit. 



