T. ir. Stanton — Fox Hills Sandstone. 179 



each other and been imbedded at tlie same time. Such a mix- 

 ture of faunas was found at five localities, as shown in the 

 following lists. The marine Fox Hills species arc marked with 

 an '''-'. 



5870. Mud Butte, SW 1/4 Sec. 25, T. 11 N., R. 18 E., about 20 

 miles south of Moreau River. 



Ostrea suhtrigonalis E. & S. 



Ostrea glabra M. <fc H. 



Anemia micronenia Meek 



Modiola meehi (E. & S.) ? 



Corbicula occidentalls M. & H. 



Corbicula cyt her if or mis M. & H. 



Corbicula subelliptica var. nioreauensis M. & H. 



Panopcea? sp. 



* Teredo sp. 



Nevitina bruneri White 

 Neritina ( Velatella^ baptista White 

 Melania insculpta Meek var. 

 Melania wyomingensis Meek 

 Viviparus sp. 

 Melanipus sp. 



* Scaphites conradi (Morton) 



The stratigraphic relations at this locahty have been described 

 in connection with the Rattlesnake Butte section on p. ] 77. 



5871. Sec. 2, T. 11 N., R. 19 E., about 4 miles south of Moreau 

 River. 



Ostrea subtrigonalis E. & S. 



Anomia micronema Meek 



Corbicula subelliptica var. nioreauensis M. & H. 



* Lunatia concinna H. & M. 



Mr. Barnett reports that the fossils were obtained from a 

 small exposure of friable sandstone in which the fossiliferous 

 band is two feet thick. 



5938. SE 1/4 SW 1/4 Sec. 18, T. 17 N., R. 26 E. 



Ostrea glabra M. & H. 



Anomia sp. 



Corbicula occidentalls M. & H. 



* Tancredia f n. sp. 

 Melania insculpta Meek 



* Scaphites conradi (Morton) 



Mr. Barnett states that the fossiliferous bed is an indurated 

 sandstone about 40 feet thick at the top of the Fox Hills. 



