216 Bulletin Vanderbilt Marine Museum, Vol. VI 



mally ; the second and third articles are subequal, as wide as long ; 

 the fourth to eighth articles, inclusive, are of approximately equal 

 length, but each is successively narrower, the distal one being 

 quite tapered. The second pair of antennae consist of nine articles ; 

 the second pair is much slenderer than the first pair and shorter 

 by the length of the distal article. The second pair of anten- 

 nae has the peduncular articles less dilated than those of the first 

 pair, the peduncular articles being successively tapered, the distal 

 article is quite minute. 



Thorax: The first thoracic segment is as long in the median 

 line as the head and has its anterolateral angles produced around 

 the proximal three-fifths of the head, the outer margins of the 

 segment laterally rounded; the postlateral angle notched; the 

 second, third and fourth segments are subequal, each being a 

 trifle shorter than the first segment; the fifth, sixth and seventh 

 segments are similar, but each is successively a little shorter and 

 has the posterior margins curved. The epimera are short, each 

 one definitely defined from the segment, subcrescentic when seen 

 in a lateral view, posteriorly truncated with the postlateral angle 

 bluntly rounded on the second, third and fourth segments, more 

 produced on the fifth and sixth segments and rounded; on the 

 seventh segment they are less produced, also rounded. Viewed 

 dorsally the epimera are thickened, rounded; the fourth, fifth, 

 sixth and seventh segments are set apart from the epimera pos- 

 teriorly with a definite notch in the margin, accentuated by a 

 sulcus extending inward, opposite the posterior angle of the re- 

 lated epimera. 



Abdomen: The first to fifth abdominal segments are short, 

 compressed, the abdomen deeply inserted, the lateral parts abor- 

 tive; the telson is decidedly wider than long, 2:1, with the dis- 

 tal margin truncated, weakly bilobed, the lateral area bluntly 

 rounded. The peduncle of the uropoda is flat dorsally, nearly as 

 wide distally as long; the outer blade is a narrow, curved knife- 

 blade shape, tapered distally, slightly longer than the inner blade, 

 but not quite reaching to the distal telsonic margin. The smaller 

 blade is similar to the larger one, but narrower, shorter and with 

 the lateral curvature less accentuated. 



Legs: All seven pairs of legs are prehensile, strongly curved, 

 hook-like. The first three pairs are directed forward, while the 

 posterior four pairs are directed backward. The first three pairs 



