white.] CEETACEOUS FOSSILS — HILLIAED STATION. 249 



9. Corbula dubiosa "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 fossds of Coalville, and is figured by Mr. Meek in IT. S. Geol. Sur. 

 40th Parallel, vol. iv, pi. 14, f. 2. It appears 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. Rep. IT. S. 

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

 in relation to the Laramie strata of Bear Biver Valley. From No. 12 of 

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

 numerous examples of Inoceramus problematicus Schlotheim, and a few 

 imperfect examples of Anchura fusiformis Meek ? These strata belong 

 without doubt within the limits of the consolidated Fox Hills Group, 

 notwithstanding the presence there of Inoceramus problematicus. 



Continuing up the valley to Hilliard Station I obtained the fossils of 

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

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

 that section about three miles further westward. 



LIST OF CRETACEOUS FOSSILS COLLECTED AT HILLIARD STATION, 



WYOMING. 



1. Ostrea soleniscus Meek. 



2. Placunopsis hilliardensis White. 



3. VolseUa (Bracliydontes) midtilinegera Meek. 



4. Cardium curium Meek & Hayden. 



5. Cardium subcurtumMeek. 



6. Cyrena securis Meek. 



7. Gorbula dubiosa White. 



8. Xeritina incompta White. 



9. Turbonilla (Chemnitzia f ) coalvillensis Meek. 



NOTES ON THE CEETACEOUS FOSSILS OF HILLIARD STATION. 



1. Ostrea soleniscus Meek. 



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

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

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

 tical range within the Fox Hills Group. 



2. Placunopsis Miliar densis White. 



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

 part of this volume. 



3. VolseUa (Bracliydontes) multilinigera Meek. 



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

 and also on those of Bear Biver Valley. 



4. Cardium curtum Meek & Hayden. 



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



* The mining of this coal was abandoned with the abandonment of Old Bear River 

 City, upon the site of which it was formerly worked. 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. 



