38 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 
broader, and approximately triangular; while, in the first maxilliped, 
the endopod and exopod are a little shorter and the latter rotinded at 
the extremity. 
The chelipeds are densely pubescent, as in Parapagurus pilosimanus, 
and resemble those of that species closely until the pubescence is re- 
moved, when they are seen to be different in form and armament. The 
right cheliped in fully grown specimens is about three times as long as 
the carapax along the dorsal line. The carpus is slightly longer than 
the merus, obscurly angulated along the inner dorsal edge, and the 
dorsal surface covered with small tubercles which are acute and almost 
spiniform along the inner edge. The chela is at least once and two- 
thirds as long as the carpus, much less than half as broad as long, com- 
pressed vertically, convex, and only slightly tuberculous above and 
below, but armed along the edges with sharp tubercles, which are most 
conspicuous along the inner edge and particularly on the dactylus, where 
they become spiniform. The digits are longitudinal, not turned to the 
right as in Parapagurus pilosimanus, about as long as the body of the 
chela, regularly tapered toward the strongly hooked tips, and the pre- 
hensile edges armed with irregular, low, and obtuse tubercles. The 
left cheliped is about two-thirds as long as the right, very slender, and 
clothed with pubescence like the right. The carpus is scarcely longer 
or stouter than the merus, and angulated and armed with a few sharp 
tubercles along the inner dorsal edge. The chela is about once and 
two-thirds as long as the earpus, scarcely stouter, rounded and unarmed, 
with the digits much longer than the body, slender, slightly curved 
downward at the tips, not gaping, and the prehensile edges sharp and 
armed with a closely set series of minute spines. 
The ambulatory legs reach to or a little by the right cheliped, are 
smooth and nearly naked, except near the tips, and unarmed, except a 
small dentiform tooth at the distal end of the dorsal edge of the carpus. 
The dactyli are longer than the propodi, slender, laterally compressed, 
strongly curved toward the acute tips, and setigerous along the dorsal 
edge and on the inner side. The fourth and fifth pairs of legs and the 
sterna of all the thoracic somites are as in Parapagurus pilosimanus. 
The appendages of the first and second abdominal somites of the 
male arise in the same way as in Parapagurus pilosimanus. The appen- 
dages of the first somite are like those of Parapagurus pilosimanus in 
form, but are very much smaller, being scarcely 3 millimeters in length 
in the largest specimen examined, and project only a little way below 
the coxe of the posterior thoracic legs. The appendages of the second 
somite are very unequally developed; the right is nearly as in Parapa- 
gurus pilosimanus in form, but is much smaller, being only 7 millimeters 
long in the largest male examined, and the terminal lamelliform seg- 
ment is a little broader in proportion, being about a fourth longer than 
the basal portion and a fourth as broad as long, and is apparently less 
deeply grooved; while the left is very much smaller, only 4.8 millime- 
