124 Bulletin Vanderbilt Marine Museum, Vol. Vl 



mately subequal ; the telson is about one and one-half times the 

 length of the sixth segment, the telson being 1.5 mm. long, dorsally 

 smooth, very little rounded toward the lateral margins, which are 

 convergent distally; the distal margin is nearly truncate, very 

 slightly rounded at the outer angles ; there are two pairs of articu- 

 lated spines, one spine of each pair being on either side of the lateral 

 margin, the proximal pair being about two-fifths of the telson's 

 length from its base, directly on the lateral margin, the second 

 pair of spines being in line with and about half-way between the 

 first pair and distal margin; there are no spines on the distal 

 angles; the distal margin is setose. The uropoda are about one- 

 fourth times longer than the telson; the peduncle with a broad, 

 evenly rounded lobe above the base of the two branches ; the outer 

 branch is equal in length to, but slightly wider than, the inner 

 branch ; this outer branch also has its outer lateral margin termi- 

 nating in an acute, subdistal tooth, with a tranverse, oblique suture 

 running inward from this point. The distal margins of both blades 

 are evenly, unequally rounded and fringed with long, web-like 

 setae. All five pairs of pleopoda have a very substantial, long pe- 

 duncle ; the first pair have a rudimentary, thread-like inner blade 

 and a medium size outer blade which is narrowly ovate distally 

 with setose margins. 



The chelipeds are subequal, directed forward, the basis slen- 

 der, longish, laterally compressed; the ischium is also laterally 

 compressed, narrowed proximally, widened distally, the outer and 

 inner distal angles encupping the base of the merus ; the merus is 

 comparatively short, length 2 mm., greatest width 1 mm., the 

 inferior distal angle a small, rounded node isolated by a small 

 incision from the main portion ; the carpus is 1 mm. long, proxi- 

 mally narrowed, widening distally ; the distal margin being 1 mm. 

 wide, evenly truncated; the propodus, including the fingers, is 

 about 3.2 mm. long, the palm is 2.5 mm. long, with the upper sur- 

 face moderately rounded, the lateral margins being nearly sub- 

 parallel ; both fingers are curved inward, with the opposing apices 

 of the chelipeds touching ; the propodal finger is slightly the shorter 

 and thicker, with the cutting edge channelled, the outer margin of 

 the cutting edge microscopically serrate ; the upper finger is very 

 slender, curved distally, with the apex pointed, overlapping that 

 of the lower finger ; the cutting edges meeting. 



The second pair of legs is subequal. The second left leg is very 



