OF THE COASTS OF SOUTH AMERICA. 59 
joint of the inner footstalk longitudinally channelled, externally deeply emarginate for 
the articulation of the second joint, which is somewhat securiform, and tridentate at its 
inner margin. 
Abdomen consisting of seven joints in the male, the third being longer and broader 
than the contiguous ones. 
Anterior feet simple, slender, smooth, shorter than the second pair ; the fingers per- 
fectly simple, and meeting only at their points. The remaining feet cylindrical, slightly 
hairy above, the hairs being thickened at the points and hooked, as are also those of the 
antenne and rostrum. ‘The nails long, acute, compressed, and curved. 
Colour a dull uniform brown, paler beneath. 
Length of the carapax, including the rostrum, 7 lines ; breadth 4 lines. 
Two male specimens were found by Mr. Cuming at Panama, on sand at the depth of 
six to ten fathoms. 
Genus Pericera, Latr. 
PERICERA VILLOSA. 
Tab. XII. Fig. 4. 
Per. testa depressd, villosd, regionibus elevatis, sulcis separatis, spind obtusa laterali utrin- 
que ; rostri cornibus validis, sublamelliformibus, divergentibus ; dente articuli basilaris 
antenne externe dente superorbitali multo longiore ; antennis exterioribus sub rostro 
insertis. 
Hab. in Sinu Guayaquil. 
3 2? Mus. Bell.—? Mus. Soc. Zool. 
This species belongs to Dr. Edwards’s second section of the genus, in which the tooth 
of the upper margin of the orbit is much shorter than that of the basilar joint of the 
external antenne. The general appearance of the carapax, its form, its remarkable 
sculpture, and its dense villous covering render it one of the most interesting of the 
genus. 
The carapax is irregularly rhomboidal, longer than it is broad, considerably produced 
anteriorly, the posterior margin obtusely angular. It is generally depressed, but the 
regions are individually elevated, and separated from each other by deep sulci. The 
whole surface is covered by a dense villous coat. The lateral margin is armed on each 
side with a long, thick, horizontal spine, somewhat conical, obtuse, and bent a little 
forwards. The eye is very small, placed on a moderate peduncle, and projects a little 
beyond the margin of the orbit, which is furnished with a single short obtuse tooth 
above. The basilar joint of the external antenne is prolonged forwards into a tooth, 
which projects considerably beyond that of the orbit. The moveable portion of these 
antenne does not extend to much more than half the length of the rostrum, by which 
they are wholly protected and concealed. The rostrum is very broad, and prominent ; 
12 
