OP ARTS AND SCIENCES. 117 



? Astacus {Cambarus) affinis, Erichson, op. cit., p. 96. 1846. 



Cambarus affinis, Girard, op. cit., p. 87. 1852. 



Cambarus Pealei, Girard, op. cit., p. 87. 1852. 



Cambarus affinis, Hagen, op. cit., p. 60, PI. I. figs. 19-22, 84, 

 85, PI. III. fig. 152, PL V. 1870. 



Cambarus affinis, Abbott, op. cit., p. 80. 1873 (habits). 



Hab. New York, New Jersey, Pennsylvania, Maryland, Dis- 

 trict of Columbia, Virginia, Lake Erie, Lake Superior. 



Erichson's type, a female, from Soutb Carolina, near Green- 

 ville (Dr. Cabanis), is perhaps the closely allied C. spinosus 

 Bundy. I have seen types of C. Pealei Girard in the Smithsonian 

 Institution. They are large C. affinis, as Hagen susjjected. 



44. Cambarus Sloanii. 



Cambarus Sloanii, Bundy, Bull. 111. Mus. Nat. Hist., No. I. 

 p. 24. 1876. — Proc. Acad. Nat. Sci. Phila., 1877, p. 172. 

 Hab. Indiana, Kentucky. 



45. Cambarus propinquus. 



Cambarus propinquus, Girard, op. cit., p. 88. 1852. 



Cambarus propinquus, Hagen, op. cit., p. 67, PI. I. figs. 34- 

 38, PL III. fig. 153. 1870. 



Hab. Toronto, Province of Ontario ; Montreal, Province of 

 Quebec ; New York, Indiana, Illinois, Michigan, Lake Superior, 

 Wisconsin, Iowa. 



46. Cambarus Sanbornii. 



Cambarus Sanbornii, Faxon, supra, p. 128. 



Hab. Smoky Creek, Carter Co., Kentucky; Oberlin, Ohio. 



47. Cambarus Harrisonii. 



Cambarus Harrisonii, Faxon, supra, p. 130. 

 Hab. Irondale, Missouri. 



48. Cambarus virilis. 



Cambarus virilis, Hagen, op. cit., p. 63, PL I. figs. 23-28, 

 PL II. figs. 128-132, PL III. fig. 155, PL VIII. 1870. 



Cambarus debilis, Bundy, Bull. 111. Mus. Nat. Hist., No. I. p. 

 24. 1876. — Trans. Wis. Acad. Sci., V. 181. 1882. — Geol. 

 Wis., Surv. 1873-1879, I. 403. 1883 (male, form II.). 



Cambarus Couesi, Streets, Bull. U. S. Geolog. Geograph. 

 Surv. Terr., III. 803. 1877. 



Cambarus virilis, Herrick, op. cit., p. 253. 1882. 



Hab. Lake Winnipeg, Saskatchewan River, Bed River of 

 the North, Toronto, and Montreal (?), Dominion of Canada; Da- 



