NOTES ON NORTH AMERICAN CRAYFISHES—Family ASTACIDZ. 
BY 
WALTER Faxon. 
The following notes are the result of an examination of the North 
American Astacidz received at the U. S. National Museum and the 
Museum of Comparative Zoédlogy and also those collected by the field 
parties of the U.S. Fish Commission since the publication of the first 
part of the author’s revision of that group.* Herein are included full 
descriptions of all the new species discovered since the publication of 
that work, together with such additions as have been made to our 
knowledge of the distribution of these animals. The notes thus form 
a supplement to the Revision of the Astacide. 
Cambarus blandingii (Harl.). 
Additional localities: North River, Lexington, Virginia; Dismal 
Swamp, outlet of Lake Drummond, Suffolk, Virginia; Tar River, 
Rocky Mount, North Carolina; Neuse River, Raleigh, North Carolina. 
Collected by D. S. Jordan (U.S. F. C.). 
Cambarus blandingii acutus (Gir.). 
York, Clark County, Illinois. H.G. Hodge (U.S. N. M.). 
Cambarus versutus Hag. 
Additional locality: Escambia River at Flomaton, above Pensacola, 
Florida. D.S. Jordan, B. W. Evermann, and C. H. Bollman (M. C. Z.). 
A young male. The rostrum tapers a little more than in the type speci- 
mens from Mobile, Alabama, and is lightly carinate above in the median 
line. In these respects it agrees with the specimens from Cape Bar- 
rancas, Florida, mentioned on page 34 of my Revision of the Astacide. 
Cambarus alleni Fax. 
Caloosahatchee River, Florida. W. H. Dall (U. S. N. M.). Two 
males, form I, two females. In the female (now known for the first 
time) the chelz are short and broad compared with those of the male. 
*A Revision of the Astacide. By Walter Faxon. Part I. The Genera Cambarus 
and Astacus. Mem. Mus. Comp. Zodl., Vol. x, No. 4, 1885. 
Proceedings National Museum, Vol. XII—No. 785. 
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