TERTIARY AGE. 509 



dolus ; remains of Turtles, of the genera Trionyx, Emys, Compsemys ; species of Croco- 

 dilus, etc. 



Besides these, near Black Butte Station, bones of a Dinosaur, Agathaumas sylvestre 

 Cope; and, southeast of the Uinta Mountains, remains of a Saurian related to the 

 Meyalosaurs, discovered by Marsh ; both Cretaceous forms. 



4. Mammals. — None yet found. 



2. Eocene, after the Laramie Period. 



X. Protozoans. — Rhizopods, Fig. 898, Oi'bitoidesMantelliLyeW, Vicksbmg group. 



2. Radiates. — (a.) In the Jackson Group: Corals, Flabellum Warlesii Con., 

 Endopaclnjs Maclurii Lea. ; Echinoderms, species of Scutella, Clyjyeaster. (b.) In the 

 Vicksburg Group : Corals, Oculina Mississippiensis Con., 0. Vicksburgensis Con., Tur- 



binoli i caulij 'era Con.; Echinoderms, Fig. 895, Clypeaster {Mortonia) Rogersi Con. 



3. Mollusks. — (a.) In the Claiborne Group: Fig. 889, Ostrea sellceformis 

 Con.; 0. divaricata Lea; 0. vomer; 0. panda Mort.; Pecten Lyelli Lea; Fig. 890, 

 Crassatelia alta Con.; Tig. 891, Astarte Conradi D.; Fig. 892, Carditn planieosta Sow., 

 from Canada de las Uvas in California, as well as east of the Mississippi and in Europe 

 ( C. densata Con.); C. Blandingii ; C. rotunda Con. ; Cardium Nicolleti ; Fig. 893, Tur- 

 ritella carinata Lea; Cahjptrophorus (Rostellaria) velatus Con., Pseudoliva vetusta Con. ; 

 Orbis rotdla Lea; Natica JEtites Con. ( Californian, as well as east of the Mississippi); 

 Anolax gigantea Lea, Olivella Alabamensis Con., Marginella larvata Con., Volutilithes 

 (Voluta) petrosa Con., Corbula gibbosa Lea; Nautilites Vanuxemi Con. (b.) In the 

 Jackson Group (species common to the Jackson and Vicksburg epochs are marked with 

 a dagger [f]): Venericardia planieosta Con.; V. rotundaf Lea; Cardium Nicolleti 

 Con. ; Corbula bicarinata Con. ; Leda multilineata Con. ; Callista sobrinaf Con. ; C. 

 imitabilis Con. ; Mactra funerataf Con. ; Psammobia linteaf Con. ; Navicula limaf 

 Con.; Cahjptrophorus velatus Con.; Cyprcect fenestralis Con.; C. linteaf Con.; C. 

 spheroidesf Con.; Conns tortilis Con.; Gastridium vetustum Con.; Mitra Milltngtoni 

 Con. ; M. dumosa Con. ; Voluta dumosa Con , Natica Vicksburgensisf Con. ; Turbinella 

 Wilsonii Con.: Dentalium Jlississippiensei Con. (c.) In the Vicksburg Group: Fig. 

 894, Pecten Poidsoni Con. ; Fig. 896, Ostrea Georgiana Con., one fourth linear di- 

 mensions ; 0. Vicksburgensis Con.; Fig. 897, Anomalocardia Mississippitnsis Con.; 

 Barbatia Mississippien^is Con. ; B. Lima Con. ; Cardium diversum Con. ; Crassatelia 

 Mississippitnsis Con. ; Panopaia oblongata Con. ; Fig. 899, Cithara Mississippiensis Con. : 

 Fig. 900, Dentalium Mississippi ense Con.; also twelve species of Pleurotomidoz, four of 

 Triton, five of Mitra, etc. 



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

 At Red Bluff, there is a stratum between the Jackson and Vicksburg beds, containing 

 many species peculiar to it; twenty-eight per cent, only are Yicksburg species, while six 

 per cent, are Jackson. 



4. Vertebrates, —(a.) In the Claiborne Group. —Fig. 915, Lamna elegans Ag.; 

 Fig. 916, Xotidanus primigenius Ag., from Richmond, Va. 



(b. ) In the Jackson Group. — Teeth of Sharks. Fig. 917, tooth of Zeuglodon cetoides, 

 natural size. 



(c.) In the Vicksburg Group. — Teeth of Sharks, Fig. 914, Carcharodon angustidens 

 Ag. ; C megalodon Ag ; Galeocerdo latidens Ag. — Reptile, Crocodilus macrorhynchus 

 Harlan. 



(d.) In the Eocene Green-sand beds of Squnnkum, Monmouth County, New Jersey. — 

 The sword-fishes, Histitphorus gracilis Mh., Embalorhynchus Kinnei Mh , Cozlorhyn- 

 chus ornatus L. ; the Saw-fish, Pristis curvidens L. The Snakes, Dinophis Halidanus 

 Mh. {Palceophis Halidanus Cope), twenty feet long, D. littoralis Mh., Dinophis grandis 

 Mh., probably over twenty feet long; the Crocodile, Crocodilus Squankensis Mh.; Ga- 

 vialis minor Mh., but six feet long. In South Carolina, Pristis ensidens L. In Virginia, 

 Piistis brachiodon Cope. 



(e. ) In the Fresh-water beds of the Rocky Mountain Region, in Wyoming, Utah, and 

 Colorado. 



