36 SMITHSONIAN MISCEI.LANEOUS COLLECTIONS 



42. CANCER GRACILIS Dana 



Cancer gracilis Dana, U. S. Exploring Expedition, Crust., i, 153, pi. vii, 

 fig. 2. Stimpson, Jour. Bost. Soc. Hist., vi, p. 460 [20], 1857. 



This species inhabits the whole coast of Oregon and Upper Cali- 

 fornia. The expedition specimen is from ]\Ionterey, presented by 

 officers of the Coast Survey. 



43. CANCER MAGISTER Dana 



Cancer magister Dana, U. S. Exploring Expedition, Crust., i. 151, pi. vii, 

 fig. I. Stimpson, Jour. Bost. Soc. Nat. Hist., vi, p. 458 [18], 1857. 



Very common in the harbor of San Francisco, Cal. Found on the 

 western coast of North America from Sitka to iMonterey. 



44. CANCER PRODUCTUS Randall 



Plate IV, Fig. 5, 5a 



Cancer productus Randall, Jour. Acad. Nat. Sci. Phila., viii, 116. Dana, 

 U. S. Exploring Expedition, Crust., i, 156, pi. vii, fig. 3. Stimpson^ 

 Jour. Bost. Soc. Nat. Hist., vi, p. 461 [21], 1857. 



Platycarcinus productus GibbES, Proc. Am. Assoc, 1S50, p. 177. 



This species was described by Randall from young specimens, 

 which differ much from the adult, both in proportions and markings. 

 Dana also figures an immature specimen, and his description will 

 scarcely apply to the adult, in which the teeth on the front and 

 antero-lateral margin are sufficiently projecting and well separated. 



The figure given in the plates represents an adult female. 



It was taken in considerable numbers near San Francisco, Cal., 

 where, next to C. magister, it is the most common species. 



Genus ETISUS Leach 



45. ETISUS CONVEXUS' Stimpson 



Plate V, Fig. 2 



Etisus convexus Stimpson, Proc. Acad. Nat. Sci. Phila., x, p. 31 [29], 1858. 



Carapax broad ; proportion of length to breadth in the male, 

 1:1.47; ii^ the female, 1:1.44; above strongly convex; areolets 

 nearly as in B. Icevimanus, but more prominent Surface somewhat 

 rugose toward the front and sides. Front slisfhtlv convex. Antero- 



^ Etisus IcBvimanus Randall. 



