Pacific Shores of North America. 19 



granulated, with the exterior apex broadly truncated. Feet 

 of the second pair longest, and equal in length to the width 

 of the carapax. In adult specimens the tarsi of the fifth 

 pair of feet are very much compressed, and not conspicu- 

 ously ciliated below. In a specimen from Sitka, the gran- 

 ulation on the upper side of the feet of the posterior pairs 

 is much stronger, and the teeth on the crest of the hand less 

 numerous and higher, than in Californian specimens. The 

 following are the measurements of several specimens in the 

 Museum of the Smithsonian Institution : — 



Locality. 



Sex. 



Length of 

 Carapax. 



Width of 

 Carapax. 



Proportions of 

 Carapax. 



Puget Sound, 



$ 



0.875 inch. 



1.27 inch. 



1:1.45 inch. 



San Francisco, 



l( 



1.23 



1.80 



1:1.46 



Monterey, " 



" 



2.51 



3.77 



1:1.50 



San Francisco, 



E( 



4.42 



7.00 



1:1.58 



Sitka, 



U 



4.90 



8.85 



1:1.80 



San Francisco, 



9 



2.55 



3.90 



1:1.53 



By these measurements and proportions it will be seen 

 that this species increases in width with age, and that the 

 female is slightly broader than the male. I have seen no 

 specimen according in dimensions with the variety figured 

 by Dana. 



This species was erroneously referred by Randall to C. 

 irroratus, Say. The succeeding species, however, approaches 

 much more closely to the eastern crab. 



C. mag-ister has been found at Sitka, (Trowbridge ;) 

 Puget Sound, (Suckley;) San Francisco Bay, (Pickering, 

 Kennerly, etc. ;) and at Monterey, (Taylor.) It is the com- 

 mon crab of the San Francisco market, and is caught very 

 abundantly about the wharves of the city. It is of a light 

 reddish-brown color, darkest anteriorly, often light orange 

 below ; inner sides of the anterior feet and hands crimson. 



Mus. Smithsonian ; Expl. Exped. ; Phil. Acad. 



