Pacific Shores of North America. 49 



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, Crust, i. 512. 

 PI. XXXII. f. 3. 



The Callianassw, like the Gebice, 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. 



p. 175. 

 Callianassa occidentalis, Stimpson ; Proc. Cal. Acad. Nat. Sci. i. 88. 



Eye-peduncles subtriangular, closely approximated at 

 their bases, but diverging and curving a little upward at 

 their pointed tips. Length of the external antennae 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 



7 



