351 The Oligocene of the Southern United States 41 



4. Marine sands of Elsheim ^PeRunadus nbovahis, Avicula 



Stampincnsis , CytherecE hicrassata) . 

 3. Septaria clays {Natica crassatina, Leda Deshaycsiana, 



Cytherea splc7idida). 

 2. Marine sands of Alzey and Weinheim {Natica crassathia, 



Penunaibis obovatus, Cerithium Boblayei). 

 I. Oyster beds {Ostrca cy at hula, O. callifcra). 

 In 1806, Faujas de Saint-Fond described the fossils of this 

 basin. "=' This monograph was followed by those of Braun.f 

 Weinkauff,]: Sandberger|| and Lepsius.§ The recent work of 

 Lepsius is of special value for both paleontological and strati- 

 graphical reference. 



*Des coquilles fossiles des environs de Mayence, Ann. du Museum, 

 t. VIII, p. 372, also in-4°, Paris, 1806. 



t Darstellung der geol. VerhJiltnisse des Mainzen TertiJirbeckens u. 

 seiner fossilen Fauna u. Flora, in Jlalc/aUT's Gco^iiosie, 1S50. 



t Septarienthon im Mainzer Becken, N.Jahrt. Mineral., p. 177, 1S60. 



II Die Conchylien d. Mainzer Tertiarbeckens, Wiesbaden, in-4°, 460 pp., 

 36 pi., 1863. 



i. Das Mainzer Becken, Darmstadt, 1883. 



