OF ARTS AND SCIENCES. 137 



dingii, and the localities for C. Blandingii given by Girard and Gibbes probably 

 appertain to C. troglodytes. The dry specimen in the Museum of Comparative 

 Zoology (No. 3337) labelled " Rocky River, Olmsted, Ohio," determined as C. 

 troglodytes by Hagen (op. cit., p. 43), is C. Clarkii. The labels of dry specimens 

 are easily transposed, and I believe this locality to be erroneous. There is an 

 alcholic specimen of G. troglodytes in the same Museum (No. 197) labelled 

 " Lawn Ridge, 111." No other specimens have been reported from the West, 

 md I doubt the accuracy of the locality label of this specimen. Specimens 

 from Richmond Co., Ga., lately received from Col. C. C. Jones, Jr., approach 

 C. Clarkii in the shape of the male appendages, while in the form of the rostrum 

 and other respects they agree with C. troglodytes. Judging from these speci- 

 mens, I believe that further explorations will break down the specific distinc- 

 tions between these two forms. But my material is not sufficient for a definite 

 opinion. 



6. CaMBARUS MANICULATUS. 



Astacus maniculatus, Le Conte, op. cit., p. 401. 1855. 



Cambarus maniculatus, Hagen, op. cit., p. 52. 1870 (after Le 

 Conte). 



Hab. Lower Georgia. 



Known only through Le Conte's description, which perhaps 

 was drawn up from an immature specimen of C. troglodytes. 



7. Cambarus Lecontei. 



Cambarus Lecontei, Hagen, op. cit., p. 47, PL I. figs. 15-18, PL 

 III. fig. 145. 1870. 



Hab. Georgia, Alabama. 



The specimens from Beaufort, N. C, and Root Pond, Miss., 

 referred to C. Lecontei by Hagen, are G. Blandingii. Three 

 young specimens from Pensacola, Fla. (M. C. Z., No. 249), 

 are also placed here by Hagen, but the justice of the determi- 

 nation seems doubtful. They do not agree well with the types 

 from Mobile. 



8. Cambarus angustatus. 



Astacus angustatus, Le Conte, op. cit., p. 401.- 1855. 



Cambarus angustatus, Hagen, p. 50, PL I. figs. 65-67, PL III. 

 fig. 146. 1870. 



Hab. Lower Georgia. 



Known only through a single type specimen in the Acad. Nat. 

 Sci. Phila. 



9. Cambarus pubescens. 



Cambarus pubescens, Faxon, supra, p. 109. 

 Hab. Georgia. 



