122 Bulletin, Vanderlilt Marine Museum, Vol. II 



The antennae are small, placed in the infra-orbital sinus. 



The antenniilae are prominent and fold obliquely within the fossett. 



The calcareous covering of the eyestalk is produced into a tongue- 

 like projection on the upper surface of the cornea ; the latter is round, 

 golden brown. 



The external maxillipeds have the ischium of the endognath orna- 

 mented on the outer face with a median longitudinal channel, on either 

 side of which is a row of spinous tubercles; the inner lateral margin 

 of the ischium is serrate, the distal margin is emarginate; the merus 

 is about three-fourths as long as the ischium and has the distal margin 

 broadly rounded, its inner distal angle cleft for the insertion of the 

 palp ; there are two large spines on the merus in continuation of the 

 outer row on the ischium, and several smaller spines; there are two 

 large spines on the outer face of the first joint of the palp and one 

 at the distal margin of the second joint ; the third joint is character- 

 istically small with two or three granulations on its outer surface and 

 a brush of long setae on its inner and distal margins. 



The chelipeds of the male are trigonal in cross section, slightly 

 more than twice as long as the maximum width of the carapace ; the 

 merus has the upper surface elevated, granulose, with half a dozen 

 tubercles of unequal size forming an approximately median row ; the 

 inner lateral margin is armed with seven triangulate, denticulate 

 teeth; the outer lateral margin is armed with seven or eight similar 

 teeth; the carpus has one or two spines on its outer margin and sev- 

 eral on the upper surface ; the propodus has the palm as long as the 

 merus and the fingers almost half as long as the palm ; the outer mar- 

 gin has eight or nine unequal, triangulate teeth, the inner margin has 

 about seven teeth ; the upper surface has a row of spinous tubercles ; 

 the lower finger has three or four teeth on the cutting edge and the 

 curved upper finger is also continuously dentate; on the upper sur- 

 face of the proximal part of the finger are two lines of convergent 

 tubercles, continuations of those on the two upper margins of the 

 propodus. 



The ambulatories are very similar, slender, except that the first pair 

 are smooth, while the second, third and fourth pairs have the meral 

 joints spinous along the posterior lateral margin and also have a very 

 few spines on the anterior lateral margin of the carpal and propodal 

 joints ; the dactyli have a fine pubescence and a very acuminate, horn- 

 colored tip. 



