126 Bulletin, Vanderhilt Marine Museum, Vol. II 



almost direct backward, uniting with a long, traverse groove which 

 extends from the margin of the cardiac region crookedly across the 

 posterior branchial lobe. There is also a well-defined groove extending 

 across the posterior region from side to side, separating the cardiac and 

 intestinal regions. The postlateral margins are brief and deeply exca- 

 vate, the fifth pair of legs, when retracted, fitting into the excavation ; 

 the posterior margin is relatively straight ; the first and second female 

 abdominal segments are visible dorsally ; the remaining five segments 

 are ventral, forming a broadly oval belt with a tapering tip. The lat- 

 eral walls of the carapace against which the chelipeds and legs are 

 closely applied, are smooth and are protected by a dense, felt-like 

 pubescence; the external maxillipeds, sternum and ventral surfaces 

 of the legs are eroded and pitted, as is the dorsal surface. 



The basal antennal segment is corrugated, its outer distal angle 

 extending to the infra-orbital sinus; the remaining joints are ex- 

 tremely rudimentary, less than one-fourth the width of the orbital 

 cavity. 



The antennulae fold obliquely within the fossett beneath the rostral 

 hood. 



The pterygostomian region is eroded, as is the upper surface of the 

 carapace. 



The external maxillipeds have the ischium of the exognath pro- 

 duced as far forward as the external distal angle of the merus of the 

 endognath ; the ischium of the latter is subrectangular, with its distal 

 margin uneven; there is a deep, submedian, longitudinal groove on 

 its outer face ; the merus is three-fifths as long as the ischium, its dis- 

 tal margin obliquely truncate, except for the inner distal angle, which 

 is slightly excavate for the reception of the palp; the outer face of 

 the merus and basal article of palp are eroded. 



The female chelipeds are equal, closely applied to the sides of the 

 body, the merus short, curved, much flattened laterally, only eroded 

 on its distal, dorsal surface ; the carpus is elongated on the upper sur- 

 face, nearly as long as the merus and rounded and deeply eroded; 

 the propodus is short, its height equalling the length of the palm on 

 the lower margin, while its upper margin is only three-fifths as long 

 as the lower ; the upper finger is deflected, one-third longer than the 

 upper margin of the palm, with three longitudinal ridges, separated 

 by grooves, on the outer face ; the cutting edge armed with six white 

 teeth ; the lower finger is stockier than the upper, has two longitudinal 

 ridges, separated by a groove, on its upper face and five large, white 



