40 Bulletin, Vanderhilt Marine Museum, Vol. Ill 



larly concave, bent, the left distal angle more produced than the right ; 

 the postlateral and distal margins spinulose. There are unusually 

 strong uropoda, that of the left side being the larger. The peduncle 

 is stocky, with the outer surface rounded. The anterior blade is much 

 the larger, with the lateral margins convergent distally, the upper one 

 convex, the lower one concave; both lateral margins are fringed with 

 long, stiff bristles, and there is a crescentic patch of pointed, erectile, 

 corneous scales on the distal part of the blade. The lower blade is 

 similar to the upper but only one-third as long. The opposite uropod 

 is scarcely half as large as the left one, which it resembles. There are 

 three abdominal appendages ; each has the peduncle nearly one-third as 

 long as the large anterior blade, which has the distal margins rounded, 

 ciliate ; the second blade is very rudimentary, tapered, less than half 

 the width of the peduncle. 



The ocular scale is scarcely one-third as long as the eyestalk, heart- 

 shaped with the convex lateral margins converging to an acute tip. 

 The eyestalk is very stout, one-third as wide as long, cylindrical ; the 

 cornea is terminal, spherical, shining black, composed of many minute 

 facets. 



The antennulae are slender; the first and second articles clavate, 

 subequal, together extending to the base of the cornea ; the third article 

 is similar to the second and approximately one-third longer, the upper 

 branch of the flagellum is composed of 12 short rings, and is stocky, 

 tapering, about as long as the second peduncular joint, and is fur- 

 nished with a dense brush of setae on the lower margin. The inferior 

 branch of the flagellum is slender and only half as long as the superior 

 branch, consisting of six rings. 



The antennae have the proximal joint small, broad basally and pro- 

 duced to an acute tooth at the outer distal angle ; the acicule is slightly 

 curved proximally, slender, acuminate, its tip reaching as far forward 

 as the outer margin of the cornea, the inner lateral margin of the 

 acicule set with long, stiff bristles. 



The external maxillipeds offer no specific characters. 



The chelipeds are conspicuously unequal, the right being the larger. 

 The merus is rounded on the upper surface and has two or three trans- 

 verse, spinous rugae ; the carpus is as long as the related palm ; the 

 smaller carpus laterally compressed and with transverse rugae; the 

 larger one as wide as the palm and with the upper surface rounded 

 with a double row of prominent spinules separated by a groove on 

 the inner half, the remaining outer half convex and granulose. The 



