PANOPEUS TANNERI. 19 
tooth ; the hands are robust, inflated, smooth, except near their articulation 
with the carpus, where scattering granules appear; upper and lower margins 
rounded ; fingers long, down-curved, smooth, canaliculate, their cutting edges 
irregularly armed with small and rather sharp teeth, without any prominent 
basal tooth ; when closed the fingers are separated by a slight gap, and their 
tips cross one another ; the color of the fingers in alcoholic specimens is very 
light brown. The chele of the right and left sides are unequal in size, but 
similar in shape. The ambulatory appendages are setose, their merus joints 
furnished with small teeth along their upper edges. The seventh segment 
of the sternum in the male is entirely concealed by the base of the abdomen. 
The coxe of the fifth pair of legs are in contact with the third abdominal 
segment. The penultimate segment of the abdomen has concave sides, the 
terminal segment is broad and rounded. 
Length of carapace, 6.5 mm. ; breadth of carapace, 10.25 mm. 
Station 3597. 85 fathoms. 1 male. 
In this species the carapace is short, the posterior margin wider than 
usual in the genus. In its general aspect it recalls P. xanthiformis A. M. Edw.; 
the meri of the ambulatory legs are denticulated on their upper margins as 
in xanthiformis, but in datus the carapace is much broader and more convex in 
an antero-posterior sense, the front is less prominent and is destitute of lobes 
at the lateral angles; the carpal tooth is blunt, etc. 
Panopeus tanneri Fax. 
Plate IIL, Fig. 4, 4. 
Micropanope polita Ratus., Proc. U. 8. Nat. Mus., XVI. 238, 1893. 
Panopeus tannert Fax., Bull. Mus. Comp. Zodl., XXIV. 154, 1893. 
Carapace moderately convex both lengthwise and transversely, smooth 
and polished in the central and hinder parts, coarsely granular on the ante- 
rior gastric and hepatic regions. The gastric and hepatic areas are well 
marked off by depressions. Front nearly straight, divided by a median tri- 
angular fissure, and projecting as a blunt tooth at each lateral angle; a 
double edge is formed by a groove which runs along the front, the lower 
edge projecting further forward than the upper edge; both upper and lower 
edges are finely granulate. The antero-lateral margins of the carapace are 
cut into triangular teeth; the first and second of these teeth are small, coa- 
lesced, connected by a shallow sinus; the third and fourth are of about an 
