aS'. I. Smith on American Crustacea. 



133 



A series of specimens give the following measurements : — 



This species is common upon the salt-marshes about New Haven, 

 Conn,, and there are specimens in the Museum of Yale College from 

 St. Augustine, Florida (Col. W, E, Foster). In the collection of the 

 Boston Society of Natural History there are specimens from Bahamas 

 (Dr. Henry Biyant), and in the collection of the I^eabody Academy 

 of Science, from Hayti (Dr. D. F. Weinland). 



At first sight this species might be mistaken for the youno- of G. 

 minax, but when specimens of each, of nearly equal size, are compared 

 there is no danger of confounding them. G. pvgnax is much smaller 

 than G. minax, the carapax is considerably broader, is not so much 

 contracted at the antero-lateral angles and is perfectly smooth, the 

 tubei'cles of the outer surface of the larger cheliped are very much 

 smaller and more crowded together, and the coloration is quite dif- 

 ferent, the red on the chelipeds and ambulatory legs being entirely 

 wanting. 



A male of tliis species, collected at New Plaven by W. C. Beecher, 

 presents a remarkable anomaly in having tlie chelipeds nearly equal 

 in size, while in other respects it is exactly like ordinary individuals. 

 This specimen is briefly noticed in the American Naturalist, vol. iii, 

 p. 557, ixnder the name of G. palustris. The left cheliped is exactly 

 like the larger cheliped of ordinary specimens, and the right one 



