66 RAFINESQUE’S 
last flattened, the other large, with several rows of warts, back of the 
opening wrinkled.—Length about two-thirds of an inch, not quite 
double the breadth; colour olivaceous brown, opening whitish. Itlives 
in the lower parts of the Ohio. This genus which contains nearly 
twenty species of fluviatile shells, was described in my 70 N. G. 
Animals, &c. I have discovered already about one hundred and 
eighty species of fluviatile and land shells in the United States. 
[From Enumeration and Account of some remarkable Natural Objects in 
the Cabinet of Prof. Rafinesque, in Philadelphia, page 2. Philadelphia, 
November, 1831. 
{2] 
IV. FOSSIL UNIVALVE SHELLS. 
13. ERPILITES, Raf. N. G. or perhaps aS. G. of Trochites. 
Opening oval, subquadrangular by the end being nearly truncate, 
columella with a twisted fold and ending with an acute point. All 
the sp. from the limestone and sandstone of Ohio and Kentucky, 
where other Univalves are very rare. I have 7 sp. at least, and shall 
here describe 5 of them. The name means creeping. Although 
these shells are marine, they appear to approximate very near to the 
Pleurocera and Melania, now living in the Rivers of the same 
region. 
14. Erpilites Multistriata, Raf. 1818. Suboval, 3 spires with 
many spiral ribs and minutely striated obliquely. Fine perfect speci- 
men from sandstone of Knobhills, one and a half inch long, with 
crystals inside. 
15. Erpilites Platenia, Raf. 1820. Broad depressed, 3 spires 
smooth, the first very large with a broad biangular flat raised band, 
becoming a spiral angle in the other spires. Large sp. two inches 
broad, silicified, from the limestone. 
16. Erpilites Ohiensis, Raf. 1818. Suboval, 5 spires smooth, 
each ending by a spiral angle onthe upper edge. Limestone of 
Ohio state, one inch. 
17. Erpilites Carinata, Raf. 1818. Oblong smooth, 5 spires 
carinated in the middle spirally. Near Lexington in limestone, boa 
half an inch, seldom petrified. 
18. Erpilites Stenotenia, Raf. 1821. Oblong smooth, 4 or 5 
spires with a narrow depressed spiral band. Limestone of 
Kentucky. 
