146 
CRUSTACEA. 
It is supposed to have been brought from the 
East Indies by Dr. Burroughs 
The second pair of feet are stronger than in the 
P. carcinus, and far more spinous. I have named it 
P . punctatus. Mus. Acad.* 
Genus Penceus. 
P. canaliculatus, (Oliv.) Mus. Acad. 
Many specimens, of a species agreeing with 
Olivier’s description of this species, excepting that 
the rostrum is armed beneath with two teeth, in- 
stead of one, have been brought from the Sandwich 
Islands by Messrs. Nuttall and Townsend. The 
carapax is black, and bordered on each side behind 
with white ; there are no spines at the base of the 
third pair of feet ; the rostrum is armed with only 
nine teeth. 
Length four to five inches. 
If distinct from Olivier’s species, I will name it 
P. marginatus- 
Crustacea Stomapoda. 
Fam. Squilliadce. 
Genus Squilla, (Rondelet.) 
S. armaria , (Rumph. et Herbs!,) (S. maculata, 
Lamarck.) Mus. Acad. 
Inhabits the Sandwich Islands, whence speci- 
mens have been brought by Mr. J. K. Townsend. 
* I have, since writing the above, seen another specimen of this 
species, brought from the West Indies. 
