34 Bulletin Vanderiilt Marine Museum, Vol. V 



branchial region there are three similar large tubercles, beyond which 

 on the outer branchial region are a line of four coarse rounded tuber- 

 cles. Interspersed among all these coarse tubercles are smaller, blunt 

 tubercles of varying sizes. The entire dorsal surface is paved "with 

 rounded, fiattish granules, these being coarser on the anterior region 

 and diminishing posteriorly, except where certain short linear groups 

 of beaded granules occur, forming much broken transverse lines on 

 the posterior fourth of the carapace including the winglike expansions, 

 where there are no tubercles. The pterygostomian region and antero- 

 lateral margins are densely hirsute. The sternal plastron is narrow, 

 granulose. The male belt is triangulate, the third to fifth segments 

 inclusive fused into one article; the apical segment a narrowed 

 triangle. 



The male chelipeds are about equal except that one has a large 

 sub-basal node on each the upper and lower fingers. The merus is cut 

 into three wide, shallow, triangular teeth that together form a wing- 

 like expansion; the anterior margin of the merus is subcarinate; the 

 carpus has its upper surface roughened by numerous tubercles and its 

 upper margin beaded and fringed with setae. The propodus is high, 

 crested above, the fingers distinctly deflected and they and a small 

 area of the lower part of the propodus are covered with coarse rough 

 granules; the outer margin of both fingers and the lower margin of 

 the palm each have a bead-like carina. Almost the entire outer sur- 

 face of the palm and carpus are covered with coarse tubercles, inter- 

 spersed with smaller tubercles and granules, as on the carapace. On 

 the lower half of the palm these tubercles form approximately two 

 longitudinal lines, while the tubercles on the upper half increase in 

 size; the upper crest is cut into six distinct triangulate teeth, which 

 in the young specimens show little difference in size. 



The left male cheliped has a large rounded process on the margin 

 of the palm, just above the base of the propodal finger. On the right 

 cheliped there is a large sub-basal node or tooth and on the related 

 upper finger there is a conspicuous, rounded, sub-basal node and a long 

 basal tooth, which interfits upon that of the lower finger. There is a 

 distinct gape between the fingers of the right male cheliped, while 

 those of the left cheliped meet throughout their length and are finely 

 dentate. 



The ambulatories are slender, laterally compressed; the merus 

 dilated and about as long as the dilated carpus and propodus consid- 

 ered together; the dactyl is slightly longer than the carpus, slender, 



