TERTIARY PERIOD. 



517 



Crassatella aha; fig. 800, Astarte Conradi Dana; fig. 801, Cardita planicosta, 

 from Caiiada de las Uvas in California, as well as east of the Mississippi, 

 and Europe (C. denmta Con.); C. Blandingii ; C. rotunda ; Cardium Nicolleti, 

 —{b.) Gasteropoda— Fig. 802, Turritella carinata Lea; CahjptropJiorus (Eostel- 

 laria) velatus ; Pseudoliva vetusta Conrad; Orbis Rotella ; Natica JEtites Con. 

 (Californian, as well as east of the Mississippi); Anolax gigantea, Olivella Ala- 

 bamensis, Ifarginella larvata, Volutilithes ( Voluta) petrosa, Corbula gibbosa*— 

 (e.) CepJialopods. — Nautilites Vanuxemi Con. 



2. Vertebrates Fig. 465, p. 277, Lamna elegans Ag.; fig. 467, Notidarms 



primigenius, from Richmond, Va. 



Brackish-icater beds of the Upper Missouri.— Figs. 803, 803 a, Corbula (Poia- 

 momya) mactriformis M. & H. ; fig. 804, Corbicula intermedia M. & H. ; fig. 

 805, Uniojiriecus M. & H. ; fig. 806, Vivipara retusa M. & H. ; fig. 807, Melania 



Coxchifers. — Figs. 803, 803 a, Corbula (Potamomya) mactriformis ; 804, Cyreue (Corbicula) 

 intermedia; 805, Unio priscus. Gasteropods— Fig. 806, Vivipara retusa; 807, Melania 

 Nebrascensis ; 808, Vivipara Leai. 



Nebrascensis M. & H. ; fig. 808, Vivipara Leai M. & H. Also, among Verte- 

 brate fossils, scales of Lepidotus ; bones of Turtles of the genera Trionyx, Emys, 

 Compsemys ; a species of Crocodilus. 



B. Jackson Epoch.— 1. Radiates — (a.) Co rals.—FlabellumWarlesii Con.; 

 Endopachys 3/aclurii Lea. — (b.) Echinoderms. — Species of Hemiaster, Clypeaster. 



2. Mollusks. — (a.) Conchifers (Species common to the Jackson and Vicks- 

 burg epochs are marked with a dagger [f ] ). — Venericardia 2>lanicosta Con.; 

 V. rotundaf Lea; Cardium Nicolleti Con.; Corbula bicarinata Con. ; Leda tnul- 

 tilineata Con.; Callista sobrinaf Con.; C. imitabilis Con.; Mactra funerataf 

 Con.; Psammobia lintea'f Con. ; Navicida Lima\ Con. — (b.) Gasteropods. — Ca- 

 lyptrophorus velatus Con. ; Cypriea fenestralis Con. ; C. lintea-f Con. ; C. spihe- 

 roides-f Con.; Conns tortilis Con.; Gastridium vetustum Con.; Ilitra Ifillingtoni 

 Con.; 31. dumosa Con.; Voluta dumosa Con.; Natiea Vicksburgensis-f Con. ; 

 Turbinella Wilsonif Con.; Dentalium Jilississippiense^ Con. 



3. Vertebrates — Teeth of Sharks.— Fig. 808 A, Tooth of Zeuglodon 

 cetoides, natural size. 



One-sixth of the species occur in the Vicksburg beds, and several in the 

 Claiborne. 



C. Vicksburg Epoch. — 1. Protozoans. — Rhizopods. — Fig. 813, Orbitoides 

 Ifantelli, small specimen. 



