138 Bulletin Vanderbilt Marine Museum, Vol. VI 



a large rounded molar which on occasion fits into a deep con- 

 cavity in the upper surface of the propodal finger. On some speci- 

 mens (female) this molar is not present. There are distinct long 

 setae present on either side of the dorsal depression of the palm 

 into which the finger closes, also many more setae present in tufts 

 of fringe-like formation across the distal margin of the propodal 

 finger ; some setae are present along the ventral margin of this 

 finger. 



The small cheliped is four-fifths as long as the great one but 

 much weaker; the merus is elongate, laterally much compressed 

 for the proximal three-fifths, the distal two-fifths moderately di- 

 lated, yet compressed; the carpus relatively longer than in the 

 great chela, dorsally rounded, distally concave ; the propodus with 

 the palm curiously four-sided, two and a half times as long as the 

 carpus; the propodal finger about one-half as long as the palm, 

 tapered, cutting edge concave, tip meeting upon that of the simi- 

 lar upper finger. 



The second right leg, adjacent to the great cheliped, has the 

 basis short, the ischium very slender, greatly elongated, 3 mm. 

 long; the merus similar, 5 mm. long; the carpus, with the first 

 joint, 1 mm. long; the second joint, 3 mm. long; the third joint, 

 0.5 mm. long; fourth joint, 0.5 mm. long; fifth joint, 1 mm. long, 

 subequal to the palm of propodus, which is much compressed lat- 

 erally, somewhat rectangular, 3 mm. high; the propodal finger 

 tapered, 4 mm. long; the upper finger more curved, also 4 mm. 

 long; both with the tips hollowed, meeting; the adjacent region 

 fringed with long setae ; fingers separated by a narrow elliptical 

 sinus. When fully extended, it reaches beyond the great chela. 

 The second left leg (female) has the basis short; ischium, 2 mm. 

 long; merus, 3 mm. long; carpus, first joint, 0.75 mm. long; sec- 

 ond joint, 2 mm. long; third joint, 0.7 mm. long; fourth joint, 0.7 

 mm. long; fifth joint, 0.9 mm. long; propodus, palm, 1 mm. long; 

 finger, 0.7 long ; upper finger, 0.7 mm. long, separated by an ellipti- 

 cal gape, tips scooped, meeting ; margins bristling with setae. 



The third leg is very slender and rather long when extended, 

 reaching slightly beyond midway the palm of the great cheliped ; 

 the merus is much compressed laterally, quite elongated, 1 mm. 

 greatest width, 3 mm. long, with each distal angle an acute tooth; 

 carpus narrower and shorter, 1.7 mm. long, with an acute distal 

 spine on the inferior margin; propodus still slenderer, 1.7 mm. 



