132 
CRUSTACEA. 
more or less roughened laterally, and with the 
anterior edge minutely dentate ; anterior pair 
stout; arm with a strong tooth near its anterior 
inferior extremity; carpus elongate, rather con- 
vex, laterally impressed, and having on its upper 
anterior edge a great spiniform crest, which is itself 
bordered with smaller spines; hand flattened on 
the side, and armed with two or three strong, sharp 
teeth, having between them a great multitude of 
impressions, similar to those of the carapax ; pincers 
flattened, acute at tip and armed with sharp, spini- 
form teeth, both on their outer edges, and on their 
prehensile side. 
Length about two inches, in the only specimen 
preserved in the collection, which was found by 
Mr. Nuttall at San Diego, in Upper California. 
It may be considered as a connecting link be- 
tween Ranina and Albunea. 
Genus Hippa, (Fabr.) 
H. emeritus, (Fabr.) Mus. Acad. 
Brought from the Sandwich Islands by Nuttall 
and Townsend, who describe it as being abundant 
there. 
The Hippa talpoida, of Say, does not differ from 
this species. 
Fam. Paguridce. 
Genus Pagurus, (Fabr.) 
P . punctulatus, (Edwards.) Mus. Acad. 
Brought from the Sandwich Islands, by Messrs. 
Nuttall and Townsend. 
