152 PROCEEDINGS OF THE AMERICAN ACADEMY 



Astaciis lemusculus, Hagen, op. cit., p. 94 (after Dana and 

 Stimpson). 



Ilab. Washington Terr, (lower part of Columbia River, 

 Puget Sound). 



One of Dana's types is in the Smithsonian Institution (No. 

 2019). 



The type of Astacus Okeganus Randall (Journ. Acad. Nat. 

 Sci. Phila., VIII. 138, PI. VII., 1839), from the Columbia River, 

 was lost or destroyed while in the hands of the artist by whom 

 the drawing was made, and no specimen answering to the figure 

 or description has since been found. The figure is very faulty, 

 as pointed out by Ilagen. I am inclined to thiidc, with Hagen, 

 that Randall's specimen belonged to the species afterwards de- 

 scribed by Dana as A. leniusculus. 



61. Astacus Trowbridgii. 



Astacus Trowbridgii, Stimpson, Proc. Bost. Soc. Nat. Hist., 

 VI. 87. Feb., 1857. — Journ. Bost. Soc. Nat. Hist., VI. 493. 

 April, 1857. 



Astacus Troichridgii, Ilagen, op. cit., p. 93, PI. III. fig. 171, 

 PL X. 1870. 



Hab. Columbia River, near Astoria, Oregon ; streams run- 

 ning into Shoalwater Bay, Washington Terr. (J. G. Cooper). 



62. Astacus nigrescens. 



Astacus nigrescens, Stimpson, Proc. Bost. Soc. Nat. Hist, 

 VI. 87. Feb., 1857. —Journ. Bost. Soc. Nat. Hist., VI. 492. 

 April, 1857. 



Astacus nigrescens, Ilagen, op. cit., p. 92, PI. III. fig. 168. 

 1870. 



Astacus nigrescens, Huxley, The Crayfish, p. 244, fig. 61, C, 

 F, I, fig. 62, C, F. 1880. 



Hab. San Francisco, California; Steilacoom, "Washington 

 Terr. 

 03. Astacus Gambei.ii. 



Catnbarus GamheUi, Girard, op. cit., p. 90. 1852. 



Astacus GamheUi, Agassiz, Proc. Acad. Nat. Sci. Phila., VI. 

 375. 1853. 



Astacus GamheUi, Stimpson, Journ. Bost. Soc. Nat. Hist., VI. 

 492. 1857. 



Astacus GamheUi, Hagen, op. cit., p. 90, PI. I. figs. 97, 98, PI. 

 III. fig. 170, PI. XT. 1870. 



Hab. Utah, Idaho, Montana, Wyoming? California? 



