190 Bulletin Vanderbilt Marine Museum, Vol. VI 



flagellum; the upper flagellum is very fleshy, dorsally wide and 

 convex, for five-sixths of its length and with a continuous series of 

 setae on the ventral surface; this branch is about as long as the 

 rostrum. The lower flagellum is quite slender, very little longer 

 than the upper one. 



The antennae have the basicerite armed with an acute tooth 

 at each the upper and lower outer distal angles, the lower spine 

 being much the longer ; the scaphocerite extends as far forward 

 as the subdistal spine of the lower rostral margin. The scapho- 

 cerite has the outer side thickened, terminating in an acute distal 

 tooth that projects beyond the truncate distal margin. This outer 

 portion of the scaphocerite is separated from the inner portion 

 by a curved longitudinal sulcus and there is additionally on the 

 proximal median region a ridge which in turn has on its inner side 

 another short sulcus ; the inner side of the blade is no wider than 

 the outer portion, except on the extreme proximal area, which 

 has its outer margin moderately convex, the distal lateral margin 

 being but little curved, while the distal margin is transversely 

 truncated ; the inner lateral and distal margins are fringed with 

 setae; the remainder of the peduncle consists of three unequal 

 articles, the distal of which is the longest; the peduncle extends 

 little over one-third the length of the scaphocerite ; the flagellum 

 is about as long as the entire body and quite slender. 



The external maxillipeds are pediform and exceed the length 

 of the scaphocerite by the distal two-fifths of the terminal article, 

 which is armed on its upper distal margin with a series of about 

 seven strong, articulated, black spines in double series ; the second 

 article is only one-third as long as the third article ; the first article 

 is about four-fifths as long as the third article and has a tooth at 

 its outer lateral distal angle ; the second article and proximal part 

 of the third article are beset with tufts of long, coarse setae. 



The chelipeds of the present specimen are unequal, the larger 

 one, extended, reaches only four-fifths the length of the scapho- 

 cerite and has the ischium slender, distally oblique, projecting on 

 the inner face of the merus in an oblique point ; the merus is regu- 

 larly cylindrical, stouter and a little longer than the ischium ; the 

 carpus is similar to the merus but only three-fifths as long; the 

 propodus is one and one-third times as long as the merus, the palm 

 being cylindrical, two-thirds of this total length, the fingers curved 

 with rounded, bidentate, black tips, which interfit, the cutting 



