176 Bulletin, Vanderhilt Marine Museum, Vol. II 



relatively straight. The dorsal surface is convex, granulose and finely 

 pubescent. On the median part of the carapace a series of areolations, 

 composed of granulations, form a curious, sharply defined, mask-like 

 or face-like sculpturation. There is a curved areolation extending 

 from the base of the lateral spine inv^ard to a deep pit at the end of 

 the urogastric line. 



The male belt is five-segmented, the third, fourth and fifth segments 

 being fused into one. The female belt is broadly oval, seven-segmented. 



The eyes are large, reniform. 



The antennulae and antennae afford no specific characters. 



The external maxillipeds have the merus almost as long as the 

 ischium, the distal margin unevenly lobate, the inner angle slightly 

 excavate; the outer surface is granular and setose and unevenly con- 

 cave on the median distal part, and convex below the base of the palp. 



The chelipeds are not remarkably long in the male ; the merus is as 

 long as half the width of the carapace, three-sided, armed with three 

 or four weak teeth and a dense fringe of long setae ; there is one weak 

 spine at the distal angle of the posterior lateral margin of the merus ; 

 the carpus has three longitudinal ridges on the outer face and is armed 

 with a slender, acute spine at the inner distal angle, which spine is 

 about as long as the inner lateral carpal margin ; there is a weak, acute 

 spine at the outer distal carpal angle ; the propodus is as long as three- 

 fifths the width of the carapace, has the upper and lower edges carin- 

 ate and two oblique, submedian carinae on the outer face; there is a 

 prominent acute tooth proximally just above the upper submedian 

 carina; the superior lateral margin has an acute, up-pointing, sub- 

 distal tooth ; the fingers are about as long as the palm, slender, taper- 

 ing, both the inner and outer faces fluted, the cutting edges unevenly 

 dentate, meeting ; the tips curved, crossing. 



The ambulatories are very slender, the first pair as long as the 

 chelipeds; the second and third pairs slightly decreasing in length; 

 the meral, carpal and propodal joints with longitudinal grooves set 

 with fine pubescence ; dactyli exceedingly slender, tapering, acuminate, 

 longitudinally grooved, approximately as long as the two preceding 

 segments taken together. 



The natatory legs are short, the ischium, merus and carpus stout; 

 the propodus laminate; the dactyl oval, laminate; the last two seg- 

 ments fringed with setae and with longitudinal areas of pubescence on 

 the wide surfaces. 



