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20 NEW SPECIES OF HERMIT CRABS—BENEDICT. 
with a sharp, conical spine; the outer angle is produced to the proxi- 
mal end of the last article; the apex is ordinarily double pointed. 
Acicle rounded, hairy on the inner margin, reaching to the tip of the eye. 
Chelipeds very unequal. In medium and small specimens the merus 
of the right cheliped does not reach beyond the eye, while in large ones 
it reaches beyond by one-half its length. It is three-sided; upper side 
convex ; lower side flat ; outer distal angle, with one or two short spines ; 
upper ridge armed with a few spiny tubercles. The length of the car- 
pus is only four-fifths of its width. Both sides are thinned out in wing- 
like expansions which turn down in such a way as to make the under 
side deeply concave. The distal angles of the expansion extend for- 
ward beyond the articulation of the manus, the anterior and lateral mar- 
gins forming rectangles. The outer margin is smooth, regularly curved ; 
the inner margin is serrate; the margin at the articulation of the 
manus is spiny, the spines short, sharp, and conical. The middle portion 
of the carpus is elevated, rather more angular than rounded. The 
proximal two-thirds of the ridge is set with spiny tubercles. In small 
specimens these tubercles are perceptible near the articulation of the 
merus ; in large specimens they are larger and much more extended. 
The hand is much narrower than the carpus, being more than twice as 
long as its greatest width. It is comparatively thin; its outer margin 
concave; inner margin arcuate ; upper surface rendered uneven by retic- 
ulate lines ofsmall granules. Both fingers are concave above and con- 
vex below; prehensile edges armed with large white tubercles ; tips not 
horny. 
The carpus of the left cheliped is flattened, inner edge spiny. The 
hand is very much flattened; viewed from above it is boat-shaped. 
The edges are upturned, making itevenly concave. The proximal mar- 
gin overlaps the distal margin of the carpus, the reverse being the case 
in most species of the genus. The fingers are slightly bent downward. 
The ambulatory legs are slender, shorter than the cheliped, equal in 
length on both sides. Thecarpal joints are spiny above, and the pro- 
podal joints nearly smooth. The dactyls are short, flat, not twisted, 
spinulose on the margins of the inner surface. Hair almost entirely 
wanting. 
Color in alcohol: The meral and carpal joints of the chelipeds are a 
light purple. Hands yellow. Ambulatory legs dark reddish orange, 
with small circular light spots. 
Alaska. 
Eupagurus gilli. 
This species is very closely related to the preceding. The eye-stalk 
is much more slender. The acicle is shorter and does not reach the ex- 
tremity of the eye. The chelipeds have about the same proportion. 
While in the last species the carpus of the large cheliped is somewhat 
angular and tubercular, in this it is rounding and smooth. The inner 
margin is slightly roughened ; the outer margin is smooth; the anterior 
