xlviii 



West Virginia. Five species are found in the Ohio 

 River and the Lakes, and two, both of which will 

 probably be found to be sometimes plicate, occur in 

 the rivers of the Pacific States. 



There are forty-three smooth, elevated Gonio- 

 hases, of which about one-fourth inhabit the Ten- 

 nessee, and the same number the Alabama River. 

 Seven or eight occur in the Ohio River and Great 

 Lakes, and two are found in California. 



Three species inhabit Louisiana, and are the only 

 StrejJ07natldce reported from that State. Neither of 

 them occurs east of the Mississippi. 



G. semicarinata, one of the species of this division, 

 extends from Tennessee and Kentucky, throughout 

 all the Western States and the Lakes, and rejoices in 

 twelve synonymes ! 



There are eight striate species, of which one, 

 G. Virginica, Say, is the only Goniobasis inhabiting 

 the rivers of New York, Pennsylvania and Maryland. 

 Through the Erie canal it is extending to the 

 Western Lakes.* 



Very close relatives to this shell are latitans, 

 Anth., and sulcosa, Lea, the former from Green 

 River, Kentucky, and the latter from Tennessee. 



There are over sixty species in the group which I 

 have designated as "compact, ponderous," for want 

 of a better name. They are essentially a distinct 

 group from the other Gonlohases, and all the s^jecies, 

 except three, are peculiar to the branches of the 

 Alahama Hiver. 



ANCULOSA. 



Thirteen species inhabit the Coosa River, three of 

 wdiich are common to the Tennessee, and one of 

 them, A. jyroirosa, extends northward to the Ohio. 

 Two others are peculiar to the Tennessee. Three 

 species are found in the Dan, Roanoke and Tar 

 Rivers. 



* Vide Dr. James Lewis, Proc. Acad. Nat. Sci. 



