280 Cincinnati Society of Natural History. 



from Bear creek, Protomeryx halli ; from the Pliocene of Ashley 

 river, South Carolina, and from the Miocene of New Jersey and 

 Viro^inia, Manatus antiquus, Phoca debUis ; from the Miocene of 

 Cumberland count\% Md., Macroplioca atlantica, now Sqvalodon 

 atlanticas, SphyrcBna speciosa ; from Noith Carolina, Orycterocetus 

 cornutidens^ Pliogonodon priscus ; from Salem countj^, New Jersey, 

 Chelonia grandceva ; from the Eocene of the Neuse river, North 

 Carolina, Ischyrhiza antiqua ; from Green river, Missouri, Clupea 

 humilis, now Diplomystus humilis ; from the Upper Tertiary' of the 

 Bijou Hills, on the Upper Missiuiri, Merychippus insignis, now 

 Protohippus insignis and Leptarctus primus. 



In 1857, Dr F. V. Hay den* made an estimated vertical section, 

 showing the order of superposition of the different beds of the Bad 

 Lands of White river, in Nebrasl^a, referred to the Miocene, in ascend- 

 ing order as follows : 



Bed A. — Light gray, calcareous grit, passing down into a stratum 

 composed of an aggregate of rather coarse, granular quartz; underlaid 

 b3^ an ash-colored, argillaceous, indurated bed, with a greenish tinge. 

 Titanotherium bed. Best developed at tlie entrance of the Basin from 

 Bear creek. Seen also in the channel of White river. Thickness, 50 

 feet. 



Bed B. — A reddish, flesh-colored, argillo-calcareous, indurated materi- 

 al, passing down into a grav color, containing concretionary sandstone, 

 sometimes an aggregate of angular grains of quartz, underlaid by a 

 flesh-colored, argillo calcareous, indurated stratum, containing a pro- 

 fusion of mammalian and chelonian remains. Turtle and Oreodon 

 bed. Revealed on both sides of White river and throughout the main 

 body of the Bad Lands. Thickness, 80 feet. 



Bed C. — Light gra}', siliceous grit, sometimes forming a compact, fine- 

 grained sandstone. Seen on both sides of White river. Also at Ash 

 Grove Spring. Thickness, 20 feet. 



Bed D. — Yellow and light yellow, calcareous marl, with argillo-cal- 

 careous concretions, and slabs of siliceous limestone, containing well- 

 preserved fresh- water shells. On the south side of White river. Seen 

 in its greatest thickness at Pina's Spring. Thickness, 40 feet. 



Bed E, — Yellowish and flesh colored, indurated argillo-calcareous 

 bed, with tough argillo-calcareous concretions, containing Testudo, 

 Hipparion, Steneojiber^ Oreodon and Rhinoceros. Seen along the 

 White river valle}^, on the south side. Thickness, 30 feet. 



* Proc. Acad. Nat. Sci., vol. ix. 



