wore | PROCEEDINGS OF THE NATIONAL MUSEUM. 7 
The carpus is single crested; lower down is a parallel line of spiny 
granules which terminates with rather a large spine atthe manus. The 
outline of the manus is slightly concave on its outer margin, while the 
inner outline is strongly convex. A sharpridge runs along the outer 
margin of the hand and pollex. At the base of the pollex the depres- 
sion is much deeper than farther along at either end of the ridge. The 
prehensile edge of the pollex is armed with small calcareous teeth, while 
the prehensile edge of the dactyl is armed witha comb of horny denticles. 
The meral, carpal, and propodal joints of the ambulatory legs are stout, 
while the dactyls are very slender, much curved, and twisted. On each 
side of each dactyl a deep groove originates at the articulation with the 
propodus and disappears towards the end of the dactyl. There is a line 
of hairs on the upper margin. 
This species is common in the Gulf of California. 
Bupagurus gladius. 
Anterior portion of carapace much broader than long. Rostral pro- 
jection angular, pointed. Angles of the lateral projection more obtuse, 
pointed. Eye-stalks very stout, flattened. Scales short, wide. Sub- 
terminal spine small, often not showing from above. The acicles of the 
aptenne extend well beyond the eyes. 
The right cheliped is very long. Merus rugose, its lower external 
distal angle produced and armed with several small spiny teeth. Car- 
pus long, convex, its inner margin marked with a row of small spines 
of unequal length. Its upper surface is evenly set with spiny granules. 
The outer margin is marked by a dense row of these granules. The 
hand at its base is much narrower than the carpus. It attains its full 
width at the base of the dactyl, where it is not quite so wide as the car- 
pus. The length of the hand in a typical specimen is 16 mm.; width 5 
mm. The inner margin is marked by a line of granules. The granules 
of the upper surface are sharp and have a tendency to stand in more 
or less transverse rows. The outer margin is thin and is bordered by 
a row of very small blunt teeth. The fingers are thin and their pre- 
hensile edges are armed with calcareous tubercles. 
The left cheliped scarcely reaches the base of the large hand. Its 
carpus has a double crest of spinules. The hand is bent outward. The 
fingers are thin and curved downward. 
The ambulatory legs are slender. The outer spines of the crest on 
the carpus often have two or three points. The crest of the propodus 
is composed of much smaller spines than that of the carpus. The dac- 
tyls are thin, wide, curved, and twisted. 
This species is closely allied to longicarpus and related species. 
Gulf of California. 
Eupagurus defensus. 
Anterior portion of carapace broad and convex. Median process 
rounded, the margin of the front between the lateral processes being an 
