154 PROCEEDINGS OP THE AMERICAN ACADEMY 



Steinkrebs, Lereboullet, Comptes Rendus, XXXIII. 379. 

 1851. 



Astacus longicomis, Lereboullet, Mem. Soc. Nat. Strasbourg, 

 V. 2 (separate pagination), PL I. figs. 2-2 d . 1858. 



Astacus torrentiurn (Steinkrebs) (in part), Gerstfeldt, Mem. 

 Acad. Imper. Sci. St. Petersbourg, IX. 574, 579, 581, 584. 1859 

 (after Koch, Erichson, and Lereboullet). 



Astacus torrentiurn (Steinkrebs), Klunzinger, Jahresh. Vereins 

 vaterlitndl. Naturkunde Wurttemberg, XXXVIII. 340. 1882. 



Hab. Central Europe (Bohemia, Bavaria, Wurtemberg, Al- 

 sace)*. 



The branchial formula of A. torrentiurn is the same as that of 

 A. 



65. Astacus pallipes. 



? Astacus astacus, Pennant, Brit. ZooL, IV. 18, PL XV. fig. 27. 

 1777. 



Astacus fluviatilis (in part), Milne Edwards, op. cit., II. 330. 

 1837 (first " variety " noted on p. 331). — Cuvier's Regne Animal, 

 Disciples' ed., Crust., PL XLIX. fig. 2. 



Duhlenkrebs,^ Lereboullet, Comptes Rendus, XXXIII. 376. 

 1851. 



Astacus fluviatilis, Bell, Hist. Brit. Stalk-eyed Crust., p. 237, 

 with cut. 1853. 



Astacus pallipes, Lereboullet, Mem. Soc. Sci. Nat. Strasbourg, 

 V. 7 (separate pagination), PL II., PL III. figs. 3-3 d . 1858. 



Astacus pallipes, var. flavus, Lereboullet, Mem. Soc. Sci. Nat. 

 Strasbourg, V. 9. 1858. 



Astacus torrentiurn (Steinkrebs) (in part), Gerstfeldt, op. cit., 

 p. 577. 1859. 



Astacus saxatilis, Heller, Die Crust, stidl. Europa, p. 217, 

 PL VII. fig. 5. 1863. 



? Astacus fontinalis (l'ecrevisse a pieds blancs), Carbonnier, 

 L'Ecrevisse, p. 8. 1869. 



atilis, and their close affinity with each other. He shows that the dark color of 

 A. Iristis is due to a coat of adhesive mould, and dismisses the question of the 

 specific value of the differences with the remark that the distinctions may have 

 been more evident during life. 



* A. torrentiurn, A. pallipes, and A. fluviatilis have been so generally con- 

 founded by European authors that the data are insufficient for definitely fixing 

 their geographical range. 



t Here considered by Lereboullet but a variety of A. fluviatilis. 



