GEOGRAPHICAL DISTEIBUTION. 173 



52. Guatemala. — A .species of Cainbaru.s was obtained by Mr. Salvin near Coban, in the 



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

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

 fig. 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, C. Cuhcnsis. The examples in the Museum of Comparative 



Zoology were obtained near Havana. According to Von IMarteiis there 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 di.stribution 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, C. Bartonii. In the remaining large rivers of New England, the Androscoggin, 

 the Saco, the jMerrimac, and the Connecticut, crayfishes are unknown. C. Bartonii has 

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



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

 this river, in Esse.K Co., New Jersey, G. Bkmdinyii occurs. This is probably its northern 

 limit in the east. 



From the Delaware and its tributaries come C. Blandingii, Bartonii, Diogenes, and 

 affinis. 



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 C. Blandingii, 

 C. Bartonii, C. Bartonii, var. robusta, C. Diogenes, JJlderi, and affinis. C. 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 C. Blandingii, Bartonii, and Diogenejs. 



Tlie Santee River and the minor streams of South Carolina yield C. Blandingii, 

 C. Blandingii, var. acuta, C. troglodytes, Carolinus, acuininatus, 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 C. Blandingii, jiuhescens, troglochjtcs, Lccontei, spiculifer, penieillatus, 

 and latimanus. In the lower part of the State are also found C. advena, angustcUus, and 

 maniculatus. 



In the St. John's River, Florida, have been found C. fedlar, Clarlcii, and Alleni. 

 G. falla.c and C. Alleni have not been found outside of the State of Florida. 



In the upper portion of the Chattahoochee River live G. spiculifer and C. latimamis. 



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

 Rivers), C. extraneus, Jordani, and spinosus have been secured ; in the upper part of the 

 Tombigbee, G. Blandingii, var. acuta, G. Icctimanus, Hayi, and Mississippiensis. At 

 Mobile, where the Alabama and Tomljigbee, after uniting, empty into Mobile Bay, 

 C. Blandingii, var. acuta, C. GlarJdi, Lccontei, and versutus occur. 



Mississi2}2n River System. — From the portion of the Mississippi Valley south of the 



