Boone, Crustacea, Cruise of "Alva," 1931 49 



similarly dilated and spinose ; the propodus with the palm about 

 as long as the carpus and two-thirds as high as long, not very 

 swollen, the outer and upper surfaces covered with squamae and 

 upper surface of the palm has additionally about five intermediate, 

 longitudinal series of smaller spines; the dactyli are about as 

 long as the palm, slender, curved distally, with a wide oval gape, 

 the tips only meeting; the tip of the lower finger is tridentate 

 and rugose ; the upper finger-tip interfits into the lower one. The 

 lower finger has a single basal molar with serrulate surface and 

 the upper finger has a smaller basal molar followed by well-spaced 

 spines, these spines tending to form a double longitudinal row 

 along the upper surface and a single row of very long spines along 

 the lower margin, this latter row continuing along the inferior 

 margin of the lower finger ; one or two rows of spines are present 

 on the outer surface; the fingers are about as long as the palm, 

 meeting throughout their length along the evenly denticulated 

 outer margin, but somewhat separated by a concavity along the 

 proximal portion; the tips are rounded, hollowed, and slightly 

 crenulated, with a sieve-like brush of setae set subdistally along 

 the outer margin of each finger. Numerous long, solitary setae 

 occur on the meral, carpal, propodal and dactylar joints of the 

 chelipeds. 



The second, third and fourth pairs of legs are similar, but 

 successively decrease in length from the first to third pairs, re- 

 spectively; each leg has the merus slightly expanded, squamose 

 on the dorsal surface and inferior lateral margin, the superior 

 lateral margin with a longitudinal series of sharp spines ; the car- 

 pus is about half as long as the merus with three acute spines on 

 the superior lateral margin, the third spine being distal; a row 

 of spinules on the upper surface, a single spine at the inner distal 

 angle ; the propodus is quite slender, about as long as the merus 

 with one or two spinules proximally on the outer surface, the in- 

 ferior lateral margin with five or six spines; the dactyl is two- 

 thirds as long as the propodus, tapered, the inferior margin with 

 five or six spines, the tips acute, curved. 



The fifth pair of legs is slender, retracted within the branchial 

 cavity. 



