of the Pacific Shores of North America. 489 
Mus. Bost. Soc.; Phil. Acad.; Smithsonian ; Expl. Ex- 
ped.; Acad. Petrop. 
CALLIANASSA GIGAS. Dana. 
Plate XXI. f. 3. 
Callianassa gigas, Dana; U. S. Exploring Expedition, Orust. i. 512. 
Pl. XXXII. f. 3. 
The Callianasse, like the Gebia, lead a subterranean life, 
and by these are formed the numerous holes, half an inch 
or more in diameter, which may be observed on most sandy 
beaches. They may be distinguished by their thin, soft 
shell, and smooth, glossy carapace. One of the hands is 
invariably much larger than the other, and this may be 
either the right or left in the same species. In C. gigas the 
larger hand is remarkably short and stout. Length, often 
five inches, 
Hab. Puget Sound, (Expl. Exped.) 
Mus. Expl. Exped. 
CALLIANASSA CALIFORNIENSIS. Dana. 
Plate XXI. f. 4. 
Callianassa Californiensis, Dana; Proc. Acad. Nat. Sci. Philad. 1854, vii. 
Pp. 175. 
Callianassa occidentalis, Srrmpson ; Proc. Cul. Acad. Nat. Sci. i. 88. 
Eye-peduncles subtriangular, closely approximated at 
Ir bases, but diverging and curving a little upward at 
their pointed tips. Length of the external antenne two 
thirds that of the body. The larger of the anterior feet is 
Smooth and glossy on the sides, and ciliate along the edges. 
Hand broadest at the base, but little longer than the carpus 
and much less in breadth, A considerable hiatus intervenes 
between the fingers when closed, and between their bases 
JOURNAL p, s, N. H. 63 
