IdO PROCEEDINGS OF THE AMERICAN ACADEMY 



10. Cambarus spiculifer. 



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

 Cambarus spiculifer, Hagen, op. cit., p. 48, PI. I. figs. 59-62, 

 PI. III. fig. 147. 1870. 

 Hab. Upper Georgia. 



11. Cambarus versutus. 



Cambarus versutus, Hagen, op. cit, p. 51, PI. I. figs. 55-58, 

 PI. III. fig. 150. 1870. 



Hab. Neighborhood of Mobile, Ala. Cape Barrancas, Fla. 



12. Cambarus Alleni. 



Cambarus Alleni, Faxon, supra, p. 110. . 

 Hab. Florida. 



13. Cambarus penicillatus. 



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



Cambarus penicillatus, Hagen, op. cit., p. 53, PI. I. figs. 93, 94, 

 [95, 96?], PI. III. fig. 149. 1870. 



Hab. Georgia, Mississippi ? South Carolina ? 



Two young female specimens from Charleston, S. C. (M. C. Z., 

 No. 254), referred by Hagen to C. penicillatus, are C. troglodytes. 

 Two other females, and two second form males, also from Charles- 

 ton, in the same collection (No. 250), may be the female and 

 second form of the male of C. penicillatus, to which they are 

 referred by Hagen ; but they differ in so many respects, that I 

 suspect they belong to another species. In the collection of 

 Prof. O. P. Hay of Butler University, Irvington, Ind., there is 

 a second form male from Eastern Mississippi, which with some 

 doubts I have referred to this species. More material must be 

 obtained before the specific characters can be accurately given, 



14. Cambarus Wiegmanni. 



Astacus {Cambarus) Wiegmanni, Erichson, op. cit., p. 99. 

 1846. 



? Cambarus Wiegmanni, Hagen, op. cit., p. 54, PI. III. fig. 151. 

 1870. 



Hab. Mexico. 



The types of Erichson's two Mexican species of Cambarus, 

 C. Wiegmanni and C. Mexicanus, could not be found in the 

 Berlin Museum, either by Hagen, who examined the collection in 

 September, 1870, or by Von Martens (Arch. Naturgesch., 1872, 

 p. 131). C. Wiegmanni alone of the known Mexican species 

 belongs to the C. Blandingii group, with hooks on the third and 



