210 Eocene Fossils of the United States. 
the remains of Zeuglodon were found and transmitted to me in 
1834, by Mr. Cooper, of Claiborne. Six miles west of Claiborne 
| examined this rock in the banks of a mill-stream and collected 
Scutella Rogersii, Pecten Poulsoni, and P. perplanus, &c. Be- 
tween Claiborne and St. Stephens it forms hills of considerable 
elevation, and abounds in that fine fossil, Plagiostoma dumosum. 
At St. Stephens, on the Tombeckbee, this limestone constitutes 
an elevated bluff and abounds in Nummulites Mantelli, Plagios- 
toma dumosum, Ostrea cretacea, &c. At Vicksburg, the Pecten 
Poulsoni is common to this rock and to the Eocene sand, and the 
Zeuglodon was found on the Washita river in similar sand, as is 
proved by portions of the matrix adhering to the bone, with frag- 
ments of well known Claiborne fossils, and a perfect valve of 
Corbula oniscus. This gigantic animal therefore lived in a period 
when the limestone and sand were both deposited, and which are 
probably of contemporaneous origin. 
The following is a list of the fossils I obtained from the Eo- 
cene limestone of Alabama and Mississippi: Zeuglodon, Owen, 
(Basilosaurus, Harlan,) Pecten Poulsoni, P. perplanus, P. elix- 
atus, P. anatipes, P. calvatus, Modiola cretacea, Plagiostoma — ) 
dumosum, Gryphzea vomer, Ostrea cretacea, O. panda, Nummu- 
lites Mantelli, Scutella Rogersii. Of these species, Ostrea cre- 
tacea, O. panda, and Gryphea vomer, occur also in the creta- 
ceous strata’ of New Jersey and Alabama. 'The fossils of the 
Carolina and Alabama limestones are figured and described by 
Dr. Morton in his Synopsis of the Organic Remains of the Creta- 
ceous Formations. 
The following species occur both in the Eocene of Paris and of 
Claiborne, &c. They were published, with the exception of 
Fusus longeevus, in 1835, in the Tert. Foss., p. 34. Solarium patu- 
lum, Lamk., 8. canaliculatum, Lamk., Bonellia terebellata, Sigare- » 
tus canaliculatus, Sow., Calyptrea trochiformis, Lamk., Pyrula 
tricarinata, Lamk., Corbis lamellosa, Lamk., Cardita planicosta, 
Lamk., Fusus longevus, Lamk. 
The last named shell was found by Professor Rogers and iden- 
tified by myself with the Paris species. ‘To the foregoing list 
may be added Trochus agglutinans, and Lithodomus dactylus, 
found by Lyell, in Georgia. 
