134 Bulletin Vanderbilt Marine Museum, Vol. VI 



rounded lobe opposite the base of the finger, followed by a much 

 broader, node-like one, beyond which the apical portion is abruptly 

 smaller, acuminate, curved inward, overlapped on the outer lateral 

 surface by the blunt terminal of the upper finger. The cutting 

 edge of the lower finger bears proximally a very deep, obliquely 

 excavated roundish cavity, into which the large oblique molar of 

 the upper finger fits, so completely encased that it is nowhere visi- 

 ble when the fingers are closed. The upper finger is dorsally sepa- 

 rated from the palm by a V-like space, due to the fact that the 

 proximal dorsal surface of this finger is truncate and bears a cir- 

 cular defined flat space, which, when the fingers are opened, fits 

 upon a similar space on the upper distal margin of the palm. Just 

 above this circular space, on the base of the upper finger, the lat- 

 eral margins of this truncate portion converge, the upper margin 

 from this point onward being a broad convexity ; the apical por- 

 tion also being a broad, rounded thickened process for a depth 

 equal to a little over half the length of the finger and terminating 

 inwardly in a subacute, denticle-like angle. Inside this broad con- 

 vex tip, the brief cutting edge is almost entirely occupied by this 

 deep obliquely inward and downward-directed blunt, subcylindri- 

 cal, distally convex basal molar tooth. On the upper and outer 

 surfaces of both fingers there are several tufts of long, slender 

 bristles that radiate from this point of attachment. These bristles 

 are also present above the base of the upper finger. These tufts 

 are nowhere very numerous and are not concentrated subdistal 

 to the finger tips. 



The second leg is characteristically slender and measures as 

 follows: ischium, 1.1 mm. long; merus, 2 mm. long and 0.5 mm. 

 greatest width, armed with an acute spine at the subdistal, inferior 

 lateral angle; carpus, first joint, 1.5 mm.; second joint. 1.0 mm.; 

 third joint, also 1.0 mm.; fourth joint, 1.3 mm. long; fifth joint, 

 1.1 mm. long ; propodus, palm 0.8 mm. and the finger 0.7 mm. long. 

 The cheliped is so compressed laterally that it is laminate; the 

 fingers are pointed, setose. 



The first and second pairs of ambulatory legs are similar, al- 

 most subequal in length and also in the breadth of the meral joints, 

 but the third pair of legs, at least in the present specimen, is con- 

 spicuously more fragile. The first ambulatory leg has: the is- 

 chium, 0.7 mm. long ; the merus, 2.2 mm. long and 1 mm. greatest 

 median width ; the carpus, 0.9 mm. long, slenderer ; the propodus, 



