GEOGRAPHICAL DISTRIBUTION. 173 



52 Gi Mima i.\. — A species of < larabarus was obtained by Mr. Salvin near Coban, in the 

 Province of Alia Vera Paz, at an elevation of about 4,300 feet above the sea. 

 (See Huxley, Proc. Zoolog. Soc. London, 1878, p. 763; The Crayfish, p. 312, 

 ii". 78; also page 7 of this work.) This is the most southern Locality from 

 which the genus Cambarus has been obtained. 



53. CUBA. One species, ft Cubensis. The examples in the Museum of Comparative 



Zoology were obtained near Havana. According to Von Martens then- are 

 indications of a second species of Cambarus native to Cuba. (See page 53.) 



Distribution of the North American Species of Cambarus and Astacus 

 according to the River Systems. 



Viewing the distribution of the various species according to the river systems, it ap- 

 pears that the St. John, Penobscot, and Kennebec Rivers are inhabited by only a single 

 species, ft Bartonii. In the remaining large rivers of New England, the Androscoggin, 

 the Saco, the Merrimac, and the Connecticut, crayfishes are unknown, ft Bartonii has 

 been found in springs at Grafton, Mass., in the Blackstone River basin. 



In the Hudson River basin ft Bartonii is widely distributed. Near the mouth of 

 this river, in Essex Co., New Jersey, ft Blandingii occurs. This is probably its northern 

 limit in the east. 



From the Delaware and its tributaries come ft Blandingii, Bartonii, Diogenes, and 

 a, finis. 



In the area drained by the rivers that empty into Chesapeake Bay, the chief of which 

 are the Susquehanna, Potomac, Rappahannock, and James, are found ft Blandingii, 

 ft Bartonii, ft Bartonii, var. robusta, ft Diogenes, T/hleri, and ajinis. ft Uhleri is known 

 only in the low region on the Chesapeake and Atlantic coasts of Maryland, often in 

 brackish and salt water. 



The rivers of North Carolina (Roanoke, Tar, Neuse, Cape Fear, and tributary streams) 

 are inhabited by ft Blandingii, Bartonii, and Diogenes. 



The Santee River and the minor streams of South Carolina yield ft Blandingii, 

 ft Blandingii, var. acuta, ft troglodytes, Carolinns, acuminatus, latimanus, spinosus, and 

 Bartonii, the last species in the head-waters of the Santee among the mountains of 

 Western North Carolina. 



The rivers which flow into the Atlantic Ocean in the State of Georgia (Savannah, 

 Altamaha, etc.) furnish ft Jitunilimjii, pubescens, troglodytes, Lecontei, spiculifer, pt nicillatus, 

 and latimanus. In the lower part of the State are also found ft advena, angustatus, and 

 mani ulatus. 



In the St. John's River, Florida, have been found ft fallax, Clarkii, and Alleni. 

 C.fallax ami ft All* iii have nut been found outside of the Stale of Florida. 



In the upper portion of the Chattahoochee River live ft spiculifer and ft latimanus. 



In the upper part of the course of the Alabama River (Etowah, Oostenaula, and I loosa 

 Rivers , ft i ctraneus, Jordani, and spinosus have been secured; in the upper part of the 

 Tombigbee, ft Blandingii, var. acuta, ft latimanus, Hayi, and Mississippiensis. At 

 Mobile, where the Alabama and Tombigbee, after uniting, empty into .Mobile Bay, 

 ft. Blandingii, var. acuta, ft Clarkii, Lecontei, and versutus occur. 



Mississippi River System. — From the portion of the Mississippi Valley south of the 



