Fresh-water Shells of Rockbridge County, Va. A05 
Univalves. . Apei> 
. Cerithium clavulus, H. C. Lea. Tampa Bay. 
C. dislocatum, Say. Southern coast. 
Dentalium coarctatum, Lam. Gulf of Mexico ; Europe. 
D. dentale, Lin. European coast. 
Dispotea rugosa, (Calyptrea, ) Brod. South America. 
D. corrugata, (Calyptrea,) Brod. ; D. ramosa, Con. South 
America. : 
Crepidula unguiformis. Atlantic coast. 
C. fornicata? Lam. Atlantic coast. 
C. conveta? Say. Atlantic coast. 
. Fulgur carica? Southern coast. 
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11. F. canaliculatus. Atlantic coast. 
12.. Natica heros, Say. Atlantic coast. 
13. N. duplicata, Say. Atlantic coast. 
. N. canrena, Lam. Florida. 
. Nassa trivittata, Say. Atlantic coast. 
. N. obsoleta, Say. Atlantic coast. 
. N. lunata, Say. Atlantic coast. 
. Oliva litterata, Lam. Florida. 
9. O. zonalis, Lam. Florida. — | 
ae Multivalve. e ) se 
Balanus ovularis. Atlantic coast. eee ae 
This makes forty nine recent, out of three hundred and forty 
four species in my cabinet. The per-centage of recent forms 
* will not vary, I presume, through future discoveries to any great 
amount. 
Arr. IX.— Notices of Fresh Water Shells, §c., of Rockbridge 
7 ; County, Virginia ; by T. A. Conran. 
Last summer, while on a visit to my friend, Constant W. 
Newkirk, Esq., in Rockbridge County, Virginia, I paid some at- 
tention to the Naiades and univalves.of the vicinity. The river 
here is called the “Calf Pasture,” and is a small stream flow- 
ing through a mountain gorge. It is a branch of North river, 
which latter unites with James river near the Blue Mountain 
chain. It may not be uninteresting to conchologists to learn that 
Seconp Szrizs, Vol. 1, No. 3.—May, 1846. 52 
