Mesozoic and Coenozoic Geology and Palaeontology. 27 



2. Dark Colored Clay. [Position of beds Nos. 2 and 3 of the Ne- 

 braska section.] 



At the present time the evidence tends to show that No. 1 of the 

 Nebraska section is represented by Nos. 1 and 2, and that Nos. 2 and 

 3 of the Nebraska section are wanting, and would find a place between 

 Nos. 2 and 3 of this section if existing. 



This bed contains large quantities of fossil wood (no animal remains 

 are known to occur in it). 



1. Fire Clay and Potter's Clay. 



This bed contains fossil wood, and numerous impressions of leaves; 

 but no animal remains. 



In making the comparison of the strata he placed a large part of the 

 Cretaceous fossils of the boundary surv^ey in the same parallel with beds 

 Nos. 2 and 3 of the Nebraska section, and below those beds in New 

 Jerse3'' and Alabama, which contain BacuUtes ovatus, ITautilus dekayi 

 mn^ Ammonites placenta. He described from Leon Springs, Pyrina 

 yavryi. 



Prof. T. A. Conrad described, from between El Paso and Fron- 

 tera, TurhinoUa texana^ Cucullma terminalis, Area subelongata., Car- 

 diuni mediale, Cytherea texana, Ostrea velUeata., JSFodosaria texana\ 

 from Leon Springs, Trigonia texana^ Protocardia Jilosa, Cardlta em- 

 inula^ Lima leonensis, Cytherea leonensis. Ammonites geniculatus, A. 

 leo7iensis, Capsa texana, Terebratiila leonensis, Turritella leonensis; 

 from Rio San Pedro, Cardium congestum, JSfatica collina, JST. texana, 

 Rostellaria collina, Buccinopsis x>arryi; from Dry creek, Mexico, Os- 

 trea cortex.^ 0. multilirata; from Turkey creek, Leon and Eagle Pass 

 roads, Pholadomya texana; from Jacun, three miles below Laredo, 

 Ostrea robusta, Ammonites pleurisepta; from other places, Corbula 

 occidentalis, Inoceramus texanus, Astarte texana, Plicatula incongrua, 

 Ostrea bella, 0. liigubris, Turritella ylaiiilateris, Nerinea schotti, and 

 Cardita subtetrica. 



Evans and Shumard* desaribed, from Nebraska, Avicula nebras- 

 cana, Limopsis striato-punctata, Cardium subquadratum, and C. va- 

 rum, now Protocardia subquadrata^ and P. rara, Area sulcatina, now 

 Nemodon sulcatinus, Leda fibrosa, nov^ JSfecer a fibrosa, 31 ytilus meeki, 

 now Volsella meeki, Ostrea subtrigonalis., Pleurotoma minor, Fusus 

 nebrascensis, Turritella multilineata, Rostellaria americana, now An- 

 chura americana.^ and Ammonites galpini. 



Meek and Haydenf described, from the Great Bend of the Missouri, 



* Trans. St, Louis Acad. Sci., vol. 1. 

 t Proc. Acad. Nat. Sci., vol. 9. 



