154 PROCEEDINGS OP THE AMERICAN ACADEMY 



Steinkrehs, Lereboullet, Comptes Reuclus, XXXIII. 379. 

 1851. 



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

 V. 2 (separate paginatiou), PL I. figs. 2-2^. 1858. 



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

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

 (after Koch, Erichson, aud Lereboullet). 



Astacus torrentium (Steinkrebs), Klunzinger, Jahresh. Vereins 

 vaterlandl. Naturkunde Wurttemberg, XXXVIII. 340. 1882. 



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

 sace)*. 



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

 A. jKillipes. 



65. Astacus pallipes. 



? Astacus astacus, Pennant, Brit. Zool., IV. 18, PI. XV. fig. 27. 

 1777. 



Astacus fiuviatilis (in part), Milne Edwards, oj). eit., II. 330. 

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

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



Duhle7ikrebs,f Lereboullet, Comptes Rendus, XXXIII. 376. 

 1851. 



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

 with cut. 1853. 



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

 V. 7 (separate pagination), PI. II., PL III. figs. 3-3'^. 1858. 



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

 Strasbourg, V. 9. 1858. 



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

 p. 577. 1859. 



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

 PLVII. fig. 5. 1863. 



? Astacus fontinalis (I'ecrevisse a picds blancs), Carbonuier, 

 L'Ecrevisse, p. 8. 1869. 



atiUs, and their close affinity with eacli other. He shows that the dark color of 

 A. tristis 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. torrentium, A. pallipes, and A. flnvidtllis have been so generally con- 

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

 their geographical range. 



t Here considered by Lereboullet but a variety oi A.flmiatUis. 



