CRUSTACEA. 
129 
Fam. Calappiadce. 
Genus Calappa, (Fabr.) 
C. tuberculata , (Fabr.) Mus. Acad. 
Brought in great numbers from the Sandwich 
Islands by Nuttall and Townsend. 
Fam. Leucosiadce. 
Genus Ilia, (Leach.) 
I. ornata. Mus. Acad. 
Corpore globoso, vix granulato; testa polita, maculis san- 
guineis confluentibus, ornata. 
Body globose ; shell nearly smooth, with only a 
few granules anteriorly, some inconspicuous tuber- 
cles on the lateral edge, one large one on each side 
of the buccal regions ; another, large hut scarcely 
elevated, above it, and one, small hut distinct, 
on each side posteriorly ; two spines placed near 
each other at the apex, and one tubercle above them; 
disk variegated with sanguineous spots, confluent 
anteriorly ; anterior feet variegated with red, about 
one-half as long again as the carapax in the female ; 
arms granulous ; epistoma dilated, leaving a con- 
siderable space between the eyes and the apex of 
the outer maxillary feet. 
Length ly* inches. 
The description is made out from female speci 
mens, brought from Upper California by Mr. 
Nuttall. 
vol. viii. — 1839. 
