182 Bulletin Vanderbilt Marine Museum, Vol. VI 



late and ciliated, the inner margin evenly convex; the greatest 

 width of the scaphocerite is across the median area; the second 

 and third peduncular articles are subcylindrical and together ex- 

 tend the length of the scaphocerite ; the flagellum, which is quite 

 slender, extends almost to the base of the dactyli of the great 

 cheliped. 



The first chelipeds are very slender, subequal, reflexed upon 

 themselves; with the ischium strong, one-third as long as the 

 merus, with the outer distal angle acute; the merus and carpus 

 are elongate, slender, subequal, the merus is slightly longer than 

 the antennal peduncle ; the propodus, finger included, is about half 

 as long as the carpus, the fingers being about as long as the palm 

 and very tapered, meeting throughout their lengths. 



The second chelipeds open vertically with the thumb above 

 and are large, subequal, when fully extended, projecting beyond 

 the body for a distance equal to or slightly greater than the total 

 body length. The merus is trigonal, 3 mm. long, projecting sub- 

 stantially beyond the scaphocerite and having an acute, triangular 

 tooth at the inferior inner (but reversed to appear outer) distal 

 angle. The carpus is short, 1 mm. long, bent, distally expanded, 

 laminate, concave, with an acute triangulation at the inner lower 

 distal angle. The propodus is 7 mm. long, the fingers being 2 mm. 

 of this length, or definitely less than one-third of the total pro- 

 podal length. The palm of the present specimen is Alpheid-\ike, 

 moderately dilated proximally, narrowed but substantially con- 

 vex distally, although somewhat laterally compressed here; the 

 longer dactyl is substantial, laterally compressed, with a strong 

 upcurved apex, which overlaps on the inner side of the down- 

 curved apex of the upper dactyl. The cutting edge of the lower 

 dactyl has two broad, triangulate teeth, one on either side of the 

 similar tooth of the upper finger. There are two distinct tufts 

 of long setae, one on the outer lateral, one on the inner lateral mar- 

 gin, but subdistal to the tip. The upper dactyl is sinuate, the con- 

 tour, viewed dorsally, showing a concave bend on the outer lateral 

 margin and the acute tip down-curved. The cutting edge has one 

 acute, strong, triangulate tooth, placed subproximally and in- 

 terfitting between two wide, triangulate teeth of the lower finger. 

 The distal half of the cutting edges of both fingers are laminate, 

 meeting, except at the over-crossed, acuminate tips. 



