Jfesozoic and CcKnozoic Geology and P aloe ontology. 281 



Bed F. — Grayish and light gray, rather coarse-grained sandstone, 

 with mnch sulphate of alumina (?) disseminated through it. Along 

 White river valley, on the south side. Thickness, 20 feet. 



Bod G. — Yellowish-gray grit, passing down into a 3'ellow and lio-ht 

 3-ellow argillo-calcareous marl, with numerous calcareous concretions, 

 and much crystalline material, like sulphate of baryta. Fossils : 

 Hipparion^ Merychippus and Steneojiber. Bijou Hills, Medicine 

 Hills, Eagle Nest Hills, and numerous localities on south side of 

 White river, also at the head of Teton river. Thickness, 50 feet. 



Bed H.— Gray and greenish -gray sandstone, varying from a very 

 fine compact structure to a conglomerate. Bijou Hills, Medicine 

 Hills, and Eagle Nest Hills. Thickness, 20 feet. 



T. A. Conrad described,* from the Miocene, in Monterey county 

 California, My a suhsinuata ; from San Pablo ba}^ Fecten pabloensis ; 

 from Santa Margarita, Salinas valle}', California,! Hintiites ci^assus ; 

 from between La Purissima and Santa Inez, Pecten dijcus ; from Santa 

 Inez mountains, Pecten magnolia, Tapes inezensis, Crassatella collina, 

 Mytilus inezensis, Turritella inezana, T. variata, JSFatica inezana ; 

 from Estrella valley, Cyclas estrellana, Ostrea panzana, Glyeimeris 

 estrellanus^ Astrodapsis antiselU ; from San Buenaventura, Tapes 

 montana, Perna montana; from Pajaro river, Santa Cruz, Venus 

 pajaroana ; from the shore of Santa Barbara count3', Arcopagia unda; 

 from Sierra Monica, Cyclas permarra, Ostrea suhjecta ; Irom San Luis 

 Obispo valley, Area ohispoana ; from SaHnas river, Monterey county. 

 Dosinia montana, D. subobliqua ; and from Gaviote Pass, Maetra 

 gavioteiisis, and Trochita costellata. 



He described^: from supposed Miocene strata at Rancho Helena, 

 below Salado, Ostrea velenlana, and from Western Texas, in strata 

 supposed to be Eocene, Venus vespertina. I am inclined to believe, 

 however, that this is a Cretaceous species. 



He described, § from the Eocene of Alabama, Caliiptrophorus trino- 

 diferus. 



Dr. Thomas Antisell|| made the following section of the Miocene 

 strata of California, viz : 



1. Upper Miocene, consisting of bituminous and foraminiferous 

 beds, trappean conglomerate, soft, yellow sandstone, foraminiferous 

 layers and argiliite beds. Thickness, 400 feet. 



=•'■ Expl. and Sur. E. R. Miss. Riv. to Pacific ocean, vol. vi. 

 T Expl. and Sur. R. R. Miss. Riv. to Pacific ocean, vol. vii. 

 t U. S. and Mex. Bound, Sur. vol. i. 



I Pro. Acad. Nat. Sci., vol. ix. 



II Expl. and Sur. R. R. Miss. Riv. to Pacific ocean, vol. vii. 



