610 



BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



Descriptions of most of the fossils embraced in this catalogue are to 

 be found in the following works : — The various Reports of Mr. Meek, in 

 Dr. Hayden's Geological Survey of the Territories ; White's Eeports to 

 Lieutenant Wheeler and Major Powell ; Meek's reports to Mr. Clarence 

 King and Captain Simpson ; and in the Paleontology of California. 



JURASSIC. 



Viviparus gilli Meek and Hayden. 

 Leioplaoodes veternus Meek and 



Hayden. 

 Yalvata f scdbrida Meek and Hay- 

 den. 

 PlanorMs veternus Meek and Hay- 

 den. 



Neritina nebrascensis Meek and 



Hayden. 

 Unio nucalh Meek and Hayden , 

 Unio stetcardi White. 



CRETACEOUS. 

 DAKOTA GROUP. 



Cyrena dakotaensis Meek and Hay- 

 den. 



Margaritana nebrascensis Meek and 

 Hayden. 



FOX HILLS GEOUP.* 



Yalvata 7iana Meek. 

 Physa carletoni Meek^ 

 Melampus antiquus Meek. 



Cyrena carletoni Meek. 

 Unio f Meek. 



LARAMIE GROUP. 



*These fresh- and brackish-water species were all found by Mr. Meek, near Coalville, 

 Utah, associated together, and also with species of the genera Neritina^ulimeUa f, Turri- 

 iella, Inoceramus, Anomia, etc. The strata are certainly Cretaceous, and not of later 

 date than the Fox Hills group. 



t These two species were originally reported from the Tertiary strata on Ham's Fork, 

 Wyoming, but they probably belong in the brackish- water beds of Sulphur Creek near 

 Bear River, Southwestern Wyoming. 



