OF ARTS AND SCIENCES. 155 



Potamobius astacus, G. B. Sowerby, Continuation of Leach's 

 Malacostraca Podophthalma Britannia?, Nos. XVIII., XIX., PL 

 XXXIV. fig. 1. 1875. 



Astacus fluviatilis,* Huxley, op. cit., passim, and p. 230 in 

 particular, frontispiece and figs. 1-60. 1880. 



Astacus torrentium* Huxley, op. cit., p. 296, fig. 61, A, D, G, 

 fig. 62, A, D. 1880. 



Astacus pallipes (der Dohlenkrebs), Klunzinger, op. cit., p. 341. 

 1882. 



Hab. Southern and Western Europe : Greece, Dalmatia, 

 Islands of Cherso and Veglia, Trieste, Italy (Heller) ; France ; 

 Switzerland ; Alsace (Lereboullet) ; Spain (Huxley) ; England, 

 Ireland. 

 66. Astacus fluviatilis. 



? Cammarus, Belon, De Aquatil., p. 353, fig. on p. 355. 1553. 



Astacus fluviatilis, Rondelet, Univ. Aquatil. Hist., Pars II. 

 p. 210, with cut. 1555. 



Astacus fluviatilis, Gesner, Hist. Animal., Lib. IV. p. 120, with 

 cut. 1558 (in part: Edelkrebs,f p. 122). 



Cammarus, Mattioli, Comment. Dioscor. de Med. Mat., Lib. II. 

 p. 309, with fig. 1565. 



Cammarus, seu Astacus fluviatilis, Aldrovandi, De Beliq. Ani- 

 mal. Exang. : Moll., etc., Cap. VI. p. 127, with cuts. 1606 (in 

 part: Krebs, Edelkrebs, p. 129). 



Cammarus, seu Astacus fluviatilis, Jonston, Hist. Nat. de Ex- 

 ang. Aquat., Lib. IV. p. 18, PI. II. fig. 4, PI. III. figs. 2, 3, 4, 

 PL IV. fig. 1 (fig. 2 after Aldrovandi). 1650. 



Cancer macrourus ; rostro supra serrato, etc., Linne, Fauna 

 Suecica, p. 358. 1746. 



Der Fluskrebs, Rosel, Insekten-Belustigung, Th. III. p. 305, 

 PL LIV.-LXI. 1755. 



Cancer astacus, Linne, Syst. Nat., 10th ed., I. 631, 1758; 

 12th ed., I. 1051, 1767. 



Astacus fluviatilis, Fabricius, Syst. EntomoL, p. 413. 1775. 



* Huxley leaves the question of the specific or the varietal value of the forms 

 A. nobilis and A. torrentium ( = A. fluviatilis and A. pallipes) undecided. 



t Under the name Astacus fluviatilis, Cammarus, or Gammarus, the older au- 

 thors included not only the Edelkrebs, or the species to which the name A. flu- 

 viatilis is now restricted, but also the Steinkrebs or Thulkrebs, a smaller form 

 now known as A. torrentium. Indeed, it is probable that these authors confounded 

 A. torrentium and A. pallipes under the name Steinkrebs. 



