174 A REVISION OF THE ASTACIDA. 
Ohio and its affluents are recorded C. Blandingit, var. acuta, C. Clarkii (near the mouth 
of the river, at New Orleans, etc.), C. Diogenes, C. immunis, var. spinirostris, and C. Palmeri 
(Obion Co., Tennessee), C. virilis and C. rusticus (trom White River, Arkansas), and 
C. Shufeldtii (New Orleans). 
In the region drained by the Tennessee River are found, (a.) in the upper part of its 
course, C, Bartonii, dubius (Cumberland Gap), rusticws (Cumberland Gap), Putnamé, extra- 
neus, hamulatus, and spinosus (the last three from near the border of the State of Georgia). 
(b.) In the southern bend of the river, within the State of Alabama, C. Blandingii, vay. 
acuta (Bridgeport and Decatur), C. lutimanus (Bridgeport), immunis (Huntsville), Girar- 
dianus, Alabamensis, compressus, spinosus, and forceps (the last five species from Lauderdale 
Co. in the northwestern corner of Alabaina). 
In the Ohio River and its tributaries (excepting the Tennessee) are found C. Blan- 
dingii, var. acuta, C. pelucidus, Bartonir, Diogenes, argillicola, dubius (Preston Co., W. Va., 
Cumberland Gap, Ky.), cornutus, immunis, virilis (Cairo, Il.), rusticus, Putnami, Sloanii, 
propinguus, and C. propinguus, var. Sanborniz. 
In the Mississippi Valley to the north of the Ohio are found C. Blandingit, var. acuta, 
C. gracilis, C. Diogenes, C. Bartonit, var. robusta (Decatur, Il), C. medius (lrondale, Mo.), 
C. Harrisonii (Irondale, Mo.), C. immunis, virilis, rusticus, and propinquus. 
From the Missouri and its affluents come C. simulans (Fort Hays, Kan.), C. Nebrascen- 
sis (Fort Pierre, Dakota), C. Diogenes (Colorado, Wyoming, Kansas), CL cinmunis (Laramie 
City, Wyo., Leavenworth, Kan.), @. virilis (Laramie City, Wyo., Nebraska, lowa, Kansas), 
and Astacus Gambelii (at the confluence of the Yellowstone and the Missouri, and perhaps 
also in the Platte River drainage in Wyoming). 
But little is known concerning the distribution of crayfishes in the rivers that flow 
into the Gulf of Mexico west of the Mississippi. C. Clarkii, simulans, virilis, and rusticus 
have been collected in Texas; C. Wiegmanni, Mexicanus, Aztecus (= C. Mexicanus ?), 
immunis, and Montezuma, in Mexico. 
The island of Cuba affords a peculiar species, C. Cubensis. 
In the great basin of the St. Lawrence River are found C. Blandingii, var. acuta, 
C. Bartonii, C. Bartonii, var. robusta, C. Diogenes, C. argillicola, C. gracilis, C. immunis, 
C. virilis, C. rusticus, C. propinguus, C. propinquus, var. Sanbornii, C. propinguus, var. ob- 
scura, and C. affinis. Of these, C. virilis, rusticus, propinquus, and Bartonii are found in 
Lake Superior; C. Blandingii, var. acuta, C. gracilis, Diogenes, immunis, virilis, rusticus, 
and propinguus, in Lake Michigan and its affluents; C. argillicola and C. propinguus, in 
the Lake Huron drainage; C. Bartonii, C. Bartonit, var. robusta, C. Diogenes, C. argillicola, 
CL immunis, C. propinquus, C. propinquus, var. Sanbornii, and C. rusticus, in Lake Erie 
and tributary streams; in Lake Ontario and its affluents, C. Bartonii, C. Bartonii, var. 
robusta, C. argillicola, C. propinquus, C. propinquus, var. obscura (Rochester, N. Y.), and 
C. affinis (Niagara). In the St. Lawrence and its affluents from the lower end of Lake 
Ontario down to Montreal are found C. Bartonii and C. propinguus ; in Lake Champlain 
and tributary streams, C. Bartonit. 
In the Hudson’s Bay water-shed, C. virilis occurs in Lake Winnipeg, Saskatchewan 
River, and the Red River of the North. 
The basin of the Great Salt Lake is inhabited by Astacus Gambelii. 
The upper waters of the Columbia River furnish Astacus Gambelii (head of Snake 
River, Idaho) and A. Alamathensis. These are replaced by A. leniuseulus and A. Trow- 
bridgii in the lower part of the Columbia. A. Klamathensis is also found in the upper 
part of the rivers of British Columbia, and as far south as Klamath Lake on the north- 
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