Boone, Crustacea, Cruise of "Alva," 1931 33 



shaped sinus on the proximal portion of the telson; the distal 

 portion has the lateral margin incised, bilobed, and the distal mar- 

 gin posteriorly is also incised and bilobed, unequally produced, 

 the left side being much the longer with the distal margin spinose- 

 setose. The uropoda are asymmetrically paired, that of the left 

 side being much the larger. 



The eyestalks are short, exceeding the depth of the antennular 

 peduncle by the depth of the cornea, or two-thirds as long as the 

 frontal width of the carapace, thickish, wider distally ; the cornea 

 is one-third of the total depth of the eyestalk ; the ophthalmic seg- 

 ment is exposed ; the ophthalmic scales separated, short, bluntly 

 triangular, with the apices blunt, directed inward, subdistally 

 serrate. 



The antennal peduncle is only two-thirds of the length of the 

 eyestalk ; the acicule is acute and extends to the basal margin of 

 the third peduncular article ; the flagellum is non-setose and ex- 

 tends not quite to the tip of the larger cheliped. 



The chelipeds are unequal, the left one being much the larger, 

 with the merus trigonal, the outer surface granulose and one distal 

 spine at the lower angle; the carpus has the entire outer and 

 upper surface granulose, these granules with a tendency toward 

 spinosity on the upper (inner) margin; the propodus and fingers 

 are granulose and a few of these granules on the upper margin 

 near the proximal end are spinose, the interstices are finely setiger- 

 ous ; the fingers are short, meeting throughout their length, the 

 tips corneous, blackish. The smaller, right, cheliped has the merus 

 smooth, except for the spinose lower and distal border ; the carpus 

 and propodus, including the fingers, granulose on the entire upper 

 and outer surface; the smaller cheliped appears to have more 

 numerous long, solitary setae than occur on the larger one. 



The second and third pairs of legs are similar, the third pair 

 exceeding the second pair in length by about one-fifth of the 

 length of the latter pair ; both pairs of legs are slender, compressed, 

 cylindrical, with the dactyl of the second pair one and two-thirds 

 times as long as the related propodus and the dactyl of the third 

 pair one and three-fourths times as long as the related propodus ; 

 the dactyli are slender, curved, setose, with a longitudinal sulcus 

 on the outer lateral surface of all except that of the third left leg. 

 This has the outer surface of the propodus granular and pitted, 

 the upper margin serrulate beneath the setae ; the related dactyl 



