216 REPORT UNITED STATES GEOLOGICAL SURVEY. 



at Black Buttes station, twelve miles farther uj) the creek, and also the 

 same as that in the valley of the Yami)a. At Point of Eocks it com- 

 prises two layers containing the fossils, separated by 50 feet of strata 

 in which none were found. Only Corhula suhundtfera White and Cam- 

 peloma veUila Meek & Hay den were found in the lower layer, and the 

 remainder of the following list were obtained from the upi^er layer. 



LIST OF LAEAjMIE FOSSILS COLLECTED AT POINT OF ROCKS STATION, 



WYOMING. 



1. Memdranipora f 



2. Ostrea glabra Meek & Hayden. 



3. Corhicida occidentaUs Meek & Hayden. 



4. Corhula siibtmdifera White. 



5. Campeloona vetula Meek & Hayden. 



The layers that have furnished the important collections of plant re- 

 mains at Point of Eocks station, which have been described by Mr. Les- 

 quereux, were found to be lower in the Laramie series than those which 

 furnished the fossils of the foregoing list, and they are also below the 

 unconformity that has been referred to. Proceeding up the valley of 

 Bitter Creek the horizon of the invertebrate fossils was once or twice 

 detected by some scattered fragments of oyster-shells, but no impor- 

 tant collections were made until I reached Black Buttes station, some 

 twelve miles to the southeastward. I stoi)ped on the way at the Hall- 

 ville mines where Mr. Meek had formerly obtained some Laramie fos- 

 sils, but as the mines had been abandoned I was unable to make any 

 collections. The strata of the Black Buttes locality were found to 

 contain fossils for a considerable distance both above and below the rail- 

 road station and upon both sides of the creek, the x)rincipal locality be- 

 ing about a mile south of the station. 



LIST OF THE LARAMIE FOSSILS COLLECTED AT BLACK BUTTES STA- 

 TION, WYOMING. 



1. Anomia micronema Meek. 



2. Anomia grypliorhynclms Meek. 



3. Ostrea glabra Meek & Hayden. 



4. Unio couesi White. 



5. Unio propheticus White. 



6. Unio aldricJii White. 



7. Unio proavitus White. 



8. Unio Jwlmesianus White. 



9. Unio endliclii White. 



10. Unio cryptorJiynchus White. 



11. Unio brachyopisthus White. 



12. Unio goniambonatus White. 



13. Unio dance Meek & Hayden. 



14. Corhicula occidentaUs Meek & Hayden. 



15. Corhicula (Leptestlies) fracta Meek. 



16. Corhula subtrigonalis Meek «& Hayden. 



17. Weritina volvilineata White. 



18. JSTeritina ( VelatellaJ haptista White. 



19. Goniohasis gracilienta Meek & Hayden. 



20. Cassiopella turricula White. 



21. Melania wyomingensis Meek. 



22. Viviparus plicapressus White. 



