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a csop. PROCEEDINGS OF THE NATIONAL MUSEUM. 25 
The left cheliped has its merus and carpus compressed, the latter 
bicristate. The hand is thin and wide. Fingers gaping at the base. 
The ambulatory legs are long, much compressed. Carpal and pro- 
podal joints crested with slender spines. The dactyls are thin, wide 
and spinulose. 
Gulf of California. 
Eupagurus cervicornis. 
The anterior portion of the carapace is very convex, glabrous. The 
three projections of the front are angular, the median in advance of 
the lateral. Eye-stalk moderately long and stout. The scales are 
sharp pointed, broad at the base, and concave. The subterminal spine 
is prominent. The ultimate joint of the antennula is long and hairy. 
The peduncle of the antenna is long. The flagellum is sparsely set 
with long hair. The acicle is rounded, slender, and reaches a little be- 
yond the tips of the eyes. 
The right cheliped is large in proportion to the size of the body. The 
-merus is much compressed ; its depth is about equal to its length; the 
lower margin is rounded. The carpus is very narrow at its proximal 
end and widens out to the manus. The inner margin is marked by a 
row of conical spines. Some of these spines are red, others white. 
The points are sharp, and hook forward. The surface is thickly set 
with spines of the same shape and color but smaller. The outer mar- 
gin is marked by a row of still smaller spines of the same character. 
The carpus is deep, running down toa point or tubercle. The tip of 
this tubercle in the specimen in hand is a red spine, surrounded by a 
circle of six or seven white spines. Outside of this cirele are numer- 
ous granules. The upper surface of the hand is suboval, and is en- 
tirely fringed with spines. Those of the outer side are to some extent 
alternately large and small, while those on the inner border are more 
uniform. The upper surface is set with sharp granules, interspersed 
with small spines. The lower surface is evenly granular. Two pro- 
tuberances on the lower surface of the hand hold the carpus firmly 
when the hand is drawn down. The prehensile edge of the dactyl is 
armed with numerous small sharp triangular teeth. 
The left cheliped is very small and weak. The merus is much com- 
pressed. The carpus is compressed and surmounted by a double crest 
of spines. The hand is thin and oval. 
Ambulatory legs compressed. Carpal joints crested with small 
spines. Dactyls wide, thin, and spinulose. Color pink in‘alcohol. 
This species is found in a coral which has grown up around the 
original shell, and usually has a number of branches not unlike a horn 
of a deer. When the animal is withdrawn, only the oval face of the 
large hand can be seen. 
Gulf of California. 
