WHITE.] CRETACEOUS FOSSILS — HILLIARD STATION. 249 



9. Corbula duhiosa White. 



This species has never been described. It is the one that has been 

 referred to at different times by myself and Mr. Meek when discussing 

 the fossils of Coahille, and is figured by Mr. Meek in U. S. Geol. Sur. 

 40th Parallel, vol. iv, pi. 14, f. 2. It api)ears so often among the Creta- 

 ceous fossils of this region, although the examples are usually imperfect, 

 that the foregoing name is given to it, provisionally, as a matter of con- 

 venience. 



Crossing Bear Eiver we proceeded eastward up the valley of Sulphur 

 Creek, along the line of Mr. Meek's section, as given in An. Itep. IJ. S. 

 Geol. Sur. Terr, for 1872, p. 451, and which has already been referred to 

 in relation to the Laramie strata of Bear Eiver Valley. From !N"o. 12 of 

 that section, immediately overlying the bed of coal* there, I collected 

 numerous examples of Inoceranms prohlematicus Schlotheim, and a few 

 imperfect examples of AncJmra fusiformis Meek ? These strata belong 

 without doubt N^ithin the limits of the consolidated Fox Hills Grouj), 

 notwithstanding the presence there of Inoceramus inohlematiGus. 



Continuing up the valley to HilUard Station I obtained the fossUs of 

 the following hst from Fox Hills strata there which are not represented 

 in Mr. Meek's section, but which are equivalent with some of those Avithin 

 that section about three miles further westward. 



LIST OF CRETACEOUS FOSSILS COLLECTED AT HILLIAED STATION, 



WYOMING. 



1. Ostrea soleniscns Meek. 



2. Placunopsis JiilUardensis White. 



3. Volsella [Brachydontes) multilinegera Meek. 



4. Cardium curtum Meek & Hay den. 



5. Cardium sithcurtum Meek. 

 C. Cyrena securis Meek. 



7. Corbula duhiosa White. 



8. Neritina incompta AVhite. 



9. Turhonilla {Chemnitziaf ) coalvillensis Meek. 



NOTES ON THE CRETACEOUS FOSSILS OF HILLIARD STATION. 



1. Ostrea soleniscus Meek. 



This species is common in the vicinity of Coalville, and, so for as I am 

 aware, it has never been found except in this region, bordering the west- 

 ern side of the Green Eiver Basin. It seems also to have a great ver- 

 tical range within the Fox Hills Group. 



2. Placunopsis hilliardensis White. 



Discovered only at this locahty. It is described and figured in another 

 part of this volume. 



3. Volsella {Brachydontes) multilinigera Meek. 



See remarks under head of notes on Cretaceous fossils of Coahille, 

 and also on those of Bear Eiver Valley. 



4. Cardium curtum Meek & Hayden. 



See remarks under head of notes on Cretaceous fossils of Coalville. 



* Tho miiiiiig of tins coal was abantloued with tLc abandonment of Old Bear River 

 City, npon the site of which it was fonucrly Avorked. It has been thought that this 

 bed of coal is equivalent with the lower one at Coalville, but it is more probably equiv- 

 alent with that of Carleton's mine, at the same place. 



