CATALOGUE 
OF THE 
FOSSIL SHELLS 
@t the Gertiary Pormations of the E{utted States, 
EMBRACING ALL THE SPECIES HITHERTO PUBLISHED. 
Mr. Conran having visited many localities of Tertiary fossils on this side of the 
Mississippi, has been able to add far more than any one else to our knowledge of 
this series of formations. He has from time to time published the results of his dis- 
coveries, in his work on the “ Fossil Shells of the Tertiary Formations of North 
America,” in the American Journal of Science,” Vol. XXIII. and in the “ Journal 
of the Academy of Natural Sciences of Philadelphia.” From these sources, from 
Mr. Say’s papers, and from Mr. Lea’s “Contributions,” the following catalogue has 
been compiled ; and for that portion of it which relates to the Eocene of Alabama, 
Iam wholly indebted to Mr. Conrad, who politely furnished it at my request. 
The names of those species which are both recent and fossil are printed in 
étalics. 
FOSSIL SHELLS OF THE MIDDLE TERTIARY FORMATION. 
Trochus humilis, Conrad. Scalaria clathrus, Lam. 
reclusus, £6 Actzon novellus, Conrad. 
Mitchelli, : CH: melanoides, KS 
philanthropus, & ovoides, is 
lapidosus, ae Pyramidella arenosa, «6 
bellus, ‘ Natica interna, Say. 
Solarium nupervm, - heros, af 
Delphinula lyra, i duplicata, se 
Pleurotoma biscatenaria, he Capulus lugubris, Conrad. 
tricaternaria, “ Crepidula costata, Morton. 
incilifera, C fornicata, Lam. 
rotifera, x aculeata ? «es 
communis, “ convexa, Say. 
parva, sé glauca, <e 
dissimilis, s plana, «c 
limatula, os Dispotea costati, & 
Virginiana, 4 grandis, sf 
pyrenoides, a Sigaretus fragilis, Conrad. 
Turritella variabilis, és Syn.Natica fragilis, “ 
octonarius, * Conus diluvianus, Green. 
alticostata, a Marylandicus, ee 
laqueata, - Cyprea annulus, Lam. 
equistriata, af Voluta solitaria, Conrad. 
plebeia, Say. Oliva litterata, Tam. 
