12 NEW SPECIES OF HERMIT CRABS—BENEDICT. 
set with spines. Depressions occur on both sides of the hand, as in the 
last species, but do not reach the carpal margin, the inner depression 
being entirely cut off by the ridge. The whole upper surface of the 
hand is set with spiny granules, between which the surface is glabrous. 
The fingers are thin, but do not curve downward. 
The left cheliped is shorter and more slender than the right. Car- 
pus compressed ; upper surface flat; both margins armed with spines, 
those of the outer margin much the longer and a little hooked forward. 
The outer face of the hand is deeply concave; the surface is granulated ; 
both margins are spinous, the spines evenly placed. The fingers are 
slender, with even, thin, prehensile edges. 
The ambulatory legs on the right side reach but little beyond the 
large hand. Merus joints much compressed ; those of the anterior pair 
armed with spines below. Upper margin of carpal and propodal joints 
armed with spines. Smaller spines exist on the carpal joints of the 
second pair, but not upon the propodal. The dactyls are curved and a 
little twisted, fringed with hair as in tannert. 
The two species are readily separated by the inner side of the raised 
triangle of the large hand. In this species it cuts off the inner depres- 
sion of the upper surface from the proximal margin of the palm, while 
in tanneri this depression is allowed to reach the margin by a curvature 
of the ridge. 
Alaska. 
Bupagurus cornutus. 
Anterior portion of carapace a little wider than long. Front triden- 
tate; median tooth larger and a little more produced than the lateral. 
The eyes are stout and in length equal about one-half the width of 
the anterior portion of the carapace. Acicles slender, subcylindrical, 
extending one-half their length beyond the eyes; external spine pro- 
duced; its apex slender; the inner margin armed with three or four 
slender teeth. 
The right cheliped is long and stout. The distal end of the merus is 
armed with short spines above and below; its upper surface is sparsely 
granulated posteriorly ; anteriorly it is set with short transverse ruge, 
from which lines of hair reach forward along the surface. The upper 
surface of the carpus is subrectangular; its linear margins sharply de- 
fined by rows of couical spines, those of the inner margin being much 
the larger; a third row of irregularly placed spines runs parallel to the 
inner magin. The hand swells out at its articulation until it is a little 
wider than the carpus, when the margins of the hand are nearly parallel 
to a point a littie beyond the gape of the fingers. From this point to 
the tip of the immovable finger the outer margin is nearly straight, the 
dactyl gently curving to the tip. The outer margin is armed with a 
single row of spines and is fringed with fine hair. The margin of the 
dactyl is the same in character, but the spines are much smaller. A 
strong, rounded, granulated ridge begins near the wrist on the inner side 
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