232 Bulletin Vanderbilt Marine Museum, Vol. VII 



ation, but the elevations and depressions in this region of the 

 carapace also outline the profile of the crown. 



The basal antennal article has a large, thick, triangulate tooth 

 at the free angle, which is well advanced, protruding beyond the 

 marginal contour of the carapace. 



The external maxillipeds are close-fitting, concealing the epi- 

 stome; the merus is truncate distally with the external angle 

 rounded. 



The chelipeds are subequal, the merus armed distally with 

 two wide, sharp, triangular teeth, the smaller of which is at the 

 anterolateral angle, the wider one at the postlateral angle and 

 immediately behind this a third, subdistal, acute, triangulate 

 tooth, approximately opposite to and nearly subequal to the 

 anterolateral tooth ; the carpus has a strong triangulate tooth at 

 the inner distal angle, the upper and lower margins carinate, an 

 interrupted nearly median carina and above this two weaker, 

 short, oblique carinae; the propodus and dactyl are nearly 1.5 

 times as long as the merus, the height of the palm being about 

 equal to half of its length, with the outer surface distinctly con- 

 vex, the upper lateral margin carinate-dentate, with eight to 

 twelve spine-like teeth; below this there are five longitudinal 

 carinae on the face of the palm in addition to the carinate inferior 

 margin ; the first of these five carinae is carinate-dentate, but less 

 so than the dorsal margin carina, and extends from the median 

 angle of the carpus to above the median area of the dactyl ; the 

 third carina is a prominent ridge, extending the length of the 

 palm and terminating near the inferior margin of the dactyl; 

 the fourth carina is a distinct, but less prominent ridge which 

 traverses the length of the palm and is continued as a stronger 

 ridge along the upper surface of the lower dactyl near the base 

 of the teeth ; the fifth carina is similarly weak along the palm, but 

 becomes a stronger carina along the lower half of the inferior 

 dactyl, this carina persisting to the tip of the dactyl. The inferior 

 margin of the propodus-dactyl is carinate and forms a wide arc. 

 The upper finger is very curved and tapered with the upper mar- 

 gin quite convex, dentate, with seven to nine rough spinose teeth 

 along the proximal three-fourths, extending about to the black col- 

 ouration of the tip ; the concave inferior margin is cut into about 

 seven low, triangulate teeth, which are blackish, this black deep- 

 ening towards the apex which is acuminate, closing upon the 



