248 EEPOET UNITED STATES GEOLOGICAL SURVEY. 



contact with tliem, I found a small exposure of Fox Hills strata, wliich. 

 are coini)osecl of soft sandstones and, like the Laramie strata there, they 

 are nearly vertical. From one of these Fox Hill's layers I obtained a 

 small collection of fossil shells, all of which are imperfect, and some of 

 the species which they indicate are not recognizable. The identification 

 of those of the following list is ]3robably correct, and shows an intimate 

 relation of these strata with those of the Coalville series. 



LIST OP CKETACEOUS FOSSILS FROM THE VALLEY OF BEAR KIVEE, 



WYOMING. 



1. Ostrea ? 



2. Volsella {Brachydontes) multilinigera Meek. 



3. JSfucula f 



4. Barhatia coalvillensis White. 



5. Cardkim trite White ? 



6. Cyrena securis Meek. 



7. Tellina f modesta Meek. 



8. Tellina {Arcopagiaf) iitaliensis Meek. 



9. Corhula duhiosa White.* 



NOTES ON THE CRETACEOUS FOSSILS OF BEAR RIVER VALLEY. 



1. Ostrea ? 



The exam]3les of this oyster are numerous and many of them well pre- 

 served, but they are all small, and so wanting in specific characters that 

 they cannot be satisfactorily identified with any published speciesor de- 

 scribed as new. They are possibly identical with 0. coalvillensis Meek. 



2. Volsella {Brachydontes) multilinigera Meek. 



This species was originally discovered by Meek at Coalville. It also 

 occurs near Hilliard Station, four miles east of this locality. 



3. NuGula f 



The examples are too imperfect for specific determination. They in- 

 dicate a species much like JSf. planimarginata Meek & Hayden. 



4. Barhatia coalvillensis White. 



Hitherto discovered only at Coalville. (See remarks under head of 

 Cretaceous fossils of that locahty.) 



5. Cardium trite White. 



The examples found here are only imperfect casts, but the surface 

 markings are more nearly like those of C. trite than those of eitlier 

 C, curtum or G. suhcurtum, the only two other species of Cardium that 

 are likely to be found in these strata. G. trite was discovered at the 

 head of Water j)ocket Canon, Utah, by Mr. Gilbert, and is described 

 and flgui'ed in another part of this volume. 



6. Gyrena securis Meek. 



This species has been discovered at Coalville and also at Hilliard Sta- 

 tion, four miles east of this locality. It is described and figured in 

 another part of this volume. 



7. Tellina ? modesta Meek. 



A Coalville species. (See remarks under that head.) 



8. Tellina {Arcopagia f) utaliensis Meek. 



See remarks under notes on Coalville fossils. 



* See follomag remarks under No. 9, 



