149 
PODOPHTHALMUS VIGIL. 
SPAR: (CXVERL 
P. testa spina laterali autrorsum spectante acutissima, bast _ 
posticé unispinosa; acutissim4 autrorsum spectante, bra- 
chiis antice trispinosis, posticé corpisque bispinosis, ma- 
nibus apice basique unispinosis. 
Portunus Vigil. Fabr. Suppl. Ent. Syst. 
Podophthalmus spinosus. Lam. Syst. des Anim. sans Vert. 
Lat. Gen. des Crust. et des Insect. i. 
Leach, Edinb. Encycl. vii. 
Habitat in India occidentalis mari. 
COMMON PODOPHTHALMUS. 
Shell with the lateral spines very sharp, turning forward, 
the base behind with one very acute spine, turning 
forward; arms before, with three spines, behind with 
two spines; wrists with two spines; hands with one 
spine at their base, and another at their apex. 
The female specimen figured on the adjoining plate, was 
brought by Mr. Mathieu from the Isle of France, where 
it is not an uncommon species. The arms of the male are 
longer. . 
In the extensive museum of organic remains collected by 
M. Defrance, there is a fossil species of this genus, which 
isa male; it differs from P. vigil, in having the shell more 
distinctly notched behind, the abdomen narrower, and the 
lateral spine of the shell behind the orbit short and rounded, 
