12 CONTRIBUTIONS TO PAL^ONTOLOGY 



Aneimia sp. Ficus trinervis 



Asplenium? coloradense ?JugIans praerugosa 



Celastrus taurinensis ?Magnolia dakotana 



Cyperacites sp. Magnolia pulchra 



Dryophyllum subfalcatum Magnohophyllum cordatum 



Dryopteris? carbonensis Phylhtes cokibrinoides 



Equisetum sp. PhyOites conwayi 



Ficus cockereUi Pistacia eriensis 



Ficus planicostata Rhamnus sahcifohus 



Ficus tesselata Sabahtes eocenica 54 



Shale, gray, soft, yehowish-brown, gyiDsiferous, with massive, soft, gray sandstone 

 lenses and three 1-foot coal beds. Horizon near middle with shells of the fresh- 

 water mohusc : 



Unio danai Meek and Hayden 216 



Sandstone, hard, gray, massive, concretionary at top 20 



Sandstone, gray, soft, nodular, with 4- to 6-inch gray shale layers 96 



Sandstone, yellowish-brown, hard, and intercalated brown and gray shales; few 

 thin carbonaceous layers. Horizon near middle with shells of brackish-water 

 mollusc : 



Ostrea glabra glabra Meek and Hayden 30 



Shale, gray to yellowish-brown, with massive, gray sandstone and concretionary 

 gray sandstone at top, containing shells of the brackish-water mollusc : 



Ostrea sp 66 



Sandstone, gray, massive, lenticular and concretionary near top 12 



Shale, yellowish and gray, with 3-foot coal bed in middle 15 



Sandstone, gray, massive, and concretionary •_ • • 17 



Shale, yellowish-brown, with intercalated layers of gray shale, thin lenses of brownish 



hard sandstone, and 3 thin coal beds 128 



Shale, gray, sandy 15 



Coal bed 3 



Fox Hills f ormation : 



Sandstones, gray, concretionary, intercalated with gray, sandy shales 267 



Sandstone, grayish-white, massive, with intercalated 6-inch layers of gray shale. 

 Horizon near middle contains numerous shells of the foUowing marine moUuscs: 



Baculites sp. 



Cardium whitei Dall 



Corbula subtrigonalis perundata Meek and Hayden 



C. subtrigonalis subtrigonalis Meek and Hayden 



Corbula sp. 



Dentahum sp. 



Discoscaphites sp. 



Gervillia recta Meek and Hayden 



Melania insculpta Meek 



M. wyomingensis Meek 



Pteria (Pseudoptera) fibrosa Meek and Hayden 



Tancredia americana Meek and Hayden 



Tellina equilateralis Meek and Hayden 



Yoldia scitula Meek and Hayden 83 



Shale, grayish-white, sandy 20 



Sandstone, gray, hard, concretionary _2£ 



Total Fox Hihs formation 385 



Lewis shale: 



Shale, grayish-white, sandy near top, grading down into darker gray shales. Thick- 

 ness not measured. 



FivE MiLEs NoRTH OF Walcott, Wyoming, Locality P. 373 

 In this region a fairly continuous section from the Lewis shale through the 

 Fox Hills formation and into the Medicine Bow formation is exposed about a mile 



