170 Bulletin, Vanderhilt Marine Museum, Vol. Ill 



the shorter whip is about an inch long and consists of stocky rings for 

 the proximal half and attentuated rings the remainder of its length ; 

 the longer whip is nearly three times as long as the shorter branch, 

 being approximately as long as the antennal flagellum. 



The antennae have a very short proximal article, the scaphocerite is 

 about one millimeter longer than the antennular peduncle, the outer 

 lateral ridge thickened, with the tip spinous, the scale narrow, not 

 quite as wide proximally, very tapered distally and ciliated along the 

 inner and distal lateral margins. The carpocerite is slender, cylin- 

 drical, exceeding the length of the antennular peduncle by about the 

 length of the third peduncular article; the flagellum is slender, 

 slightly longer than the body. 



The first chelipeds are large, both hairy ; the right one twice as long 

 and conspicuously larger than the left, the right one having the palm 

 about as long as the carapace, rather compressed, its height being one- 

 half its length. There is a deeply channelled, transverse groove on the 

 upper surface of the palm, subdistal to the margin behind the base of 

 the finger; a slighter, crooked surface runs back from the dorsal 

 groove for about half the length of the lateral faces of the palm; 

 below and parallel but not confluent with the dorsal sulcus, there is 

 a deeper constriction on the lower surface, at the base of the finger. 

 The lower finger is stout, excavate proximally, the lateral walls on each 

 side encupping the upper finger, the apex of the lower finger is short, 

 acute. The upper finger is curved, beak-like, with an acute tip and 

 an enormous basal molar. The small chela has the carpus cup-like, 

 the palm of the propodus about as long as the finger, three-fifths as 

 high as long, with a light, transverse sulcus at the base of the propodal 

 finger ; the fingers are approximately subequal, long, slender, meeting 

 throughout their length. 



The second legs are extremely slender, almost as long as the smaller 

 first leg; the carpus of the second leg has the first article two-thirds 

 as long as the merus ; the second article three-fourths as long as the 

 first; the third and fourth articles subequal, each one-half as long as 

 the second article ; the fifth article is a third longer than the fourth ; 

 the propodus is of about the same diameter as the carpus, the palm 

 being one-half the propodal length; the fingers are slender, corneous 

 tipped. 



The third, fourth and fifth pairs of legs are successively shorter, 

 compressed ; the propodus armed on the ventral surface with a double 

 row of seven each, sharp articulated spines ; the dactyl is three-fifths 



