124 
CRUSTACEA. 
covered with wrinkles, the anterior ones plicate, 
some of them bearing tufts of hairs ; median impres- 
sion distinct ; front vertical, profoundly four-lobed, 
lobes truncate, edge sinuous, profoundly excavated ; 
epistoma granulous ; buccse and lateral regions of 
the body very strongly reticulate ; anterior feet at 
least twice the length of the body, and very stout ; 
arm with a notch on its upper edge ; carpus with 
dense rugte, resembling rows of confluent tubercles; 
hand convex, very broad, less rough than the car- 
pus, its upper edge quite sharp ; pincers stout, with 
tuberculous edges, their prehensile side armed with 
unequal teeth ; thighs of the four posterior pairs of 
feet with plicae, extending upon the upper edge and 
giving it a somewhat dentate appearance, one tooth 
near the extremity ; antepenultimate joint sulcate, 
the last a little hairy on its upper edge ; tarsi long 
and sharp ; striate with hairs. 
Length about l T a ff inches. 
A single specimen, (a male,) labelled as brought 
from Surinam by Dr. Herring. 
Genus Grapsus. 
G. hirtus, (Grapse rude? Edw.) Mus. Acad. 
Testa depressa, striata, hirta, scabrosa, margine 2-dentata, 
manibus parvis. 
Front vertical, profoundly lobed, greatly pro- 
duced, less than one-half as broad as the anterior 
portion of the shell ; body entirely brown, with a 
few obscure spots; carapax depressed, scabrous, 
transversely striate, and covered with short, stiff 
