llesozoic and CcBVozoic Geology and Palaeontology. 163 



now Uyiio tellinoides, Pleufotoma.ria unkmgulata^ Cerithium fremonti, 

 C. tenerum, now Goniobasis tenera^ J^fatica (?) occidentalis, and Tttr- 

 bo paludinoifQr'mis, now Viviparus paludinoeformis. 



William Lonsdale* described, from the Miocene of Virginia, Colum- 

 naria sexradiata, Heteropora tortilis, now Jlulticrescis tortilis, Es- 

 charina tumiditla,now Cellepora tumidula^Cquadrangularis^novf Rep- 

 tocelleporaria quadrangular is, 0. informata, now B. informata, C. 

 similis, now H. similis, C. umbilicata, now MultijJorina icinbilicata. 

 From the Eocene, Ocellaria ramosa, Flabellum cuneiforme, Dendro- 

 phylUa IcBvis, Cladocera recrescens, Caryophyllia subdichotoma, Idmo- 

 nea commiscens, I. maxillaris, Ilippothoa tuberculum^ now Pyriflus- 

 trella tubercula.^ Eschara incumbens, E. petiolus^ E. tubttlata, E. 

 viminea, E. l/'nea, now Escharinella linea, Lunulites distans, L. sex- 

 angulatiis, and L. contiguus. Lyell and Sowerby described Terebra- 

 tula wilmingtojiensis, now Rhynchonella wilmingtonensis, and Ceri- 

 thium georgianum. And Edward Forbes described, Scutella jonesi> 

 now Clypeaster jonesi. 



In 1846, Mr. Conradf demonstrated that the white limestone of 

 Southern Alabama and Mississippi, which had been previously classed 

 with the upper Cretaceous rocks, belongs more properly with the 

 lower Eocene, and described Dentalium arciformis, Fistulana larva., 

 Lutraria lapidosa, now Pteropsis lapidosa., Crassatella rhomboidea, 

 C. palmula, Amphidesma tellinula, Tellina silUmani, T. raveneli, and 

 Lucina modesta. 



He found evidences of the EoceneJ and [Miocene in East Florida, 

 and described the Tertiar}^ of Warren county, Mississippi, and stated, 

 that it marks a distinct era in the American Tertiar^^ system inter- 

 mediate to the Eocene and Miocene, but more nearly allied to the for- 

 mer. He described the Eocene at Vicksburg, and in the bluffs on the 

 Mississippi river, and defined, from the Upper Eocene limestone of 

 Tampa Bay, BuUmus floridanus, Bulla petrosa, NummuUtes flori- 

 danus, Cristellaria rotella, Venus penita, now Cryptogramma penita, 

 V. floridana, now G. Jloridana, jVucula tellinula, Cytherea floridana, 

 and Balaniis humilis. 



Dr. Dickeson§ described, from the blue clay that underlies the dilu- 

 vial drift east of Natchez, Mississippi, a fossil, os innominatum, that 

 once belonged, as he supposed, to a 3'oung man about 16 3-ears of age. 



* Quar. Jour. Geo. Soe. Lend., vol. i. 

 t Am. Jour. Sei. and Arts. 2i.l ser., vol. i. 

 t Am. Jour. Sci. and Arts, 2d ser., vol. ii. 

 I Vyov. Acad. Nat. Sci., vol. iii. 



