OF ARTS AND SCIENCES. 147 



? Astacus (^Camhm-us) affinis, Erichson, op. cit., p. 96. 184G. 



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



Gambm'us Pealei, Girard, op. cit., p. 87. 1852. 



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

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



Cambarus ojfflnis, 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 South Carolina, near Green- 

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

 Buudy. I have seen types of C. Pealei Girard iu the Smithsonian 

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



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 fuopinquus. 



Cambarus prop/ nquHS, Girard, op. cit., p. 88. 1852. 



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

 38, PI. IIL fig. 153. 1870. 



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

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

 AViscousin, 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. Iroudale, Missouri. 



48. Cambarus virilis. 



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

 PI. IL figs. 128-132, PI. III. fig. 155, PI. VIIL 1870. 



Cambarus debilis, Bundy, Bull. 111. ]\Ius. 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., IIL 803. 1877. 



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



Hab. Lake Winnipeg, Saskatchewan River, Red River of 

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



