Geol.— Vol. II.] AXDERSON—STRATIGRAPHIC STUDY 187 



rocks is exposed with a dip of 40° to 60*^ to the northeast. 

 The series consists of alternatincr horizons of sandstone and 

 siliceous shales, the former of which greatly preponderate. 



The lowest fossil horizon near the base of the series, and 

 the second one some thirteen hundred feet above the base 

 contained ver}' nearly the same fauna, from the latter of 

 which the following species were collected : 



Turritella ocoyaiia Conrad Cytherea {Callisia) mathewsoni 



Trochita filosa Gabb Gabb 



Agasoma gravidiim Gabb Dositiia mathewsoni Gabb 



Crcpidula grandis Conrad Mytilns mathewsoni Gabb 



Crepidida p7-aert(pta Conrad Lucina richthofeni Gabb 



Neverita callosa Gabb Pec ten estrellatms Conrad 



Fusus {Hemifusus) icilkesana n. sp. Pecten sp. 



Scaphander jugulai-is Conrad Glycimeris estrettanus Conrad 



A third fossiliferous horizon within twenty-five hundred 

 feet of the top of the Miocene series yielded essentiall}' the 

 same fauna with one or two additional forms, as Pecten 

 nevadensis, Oliva calif ornica n. sp., and an undescribed 

 species of Dosinia, etc. This horizon is well exposed about 

 four miles southeast of La Panza Springs on the east side of 

 the San Juan River. It is overlain by shaly beds with a 

 fauna resembling that of the Monterey Shales. 



Kern River Beds. 



Although this locality' was not specially studied, and lies 

 without the Mount Diablo Range, still it has long been 

 known, and lies within the interior basin of California. 

 The locality is on Kern River, two to six miles east of Oil 

 City, Kern County. The strata are mainly sands and sand}' 

 clan's, dipping gently toward the west. The entire thickness 

 of the strata exposed along the river aggregates about three 

 thousand feet, of which the lower two-thirds belongs to the 

 Miocene. Toward the base they become very fossiliferous, 

 containing numerous species of invertebrates, teeth of sharks, 

 and bones of fishes and other marine vertebrates. 



The following species were collected in the vicinity of 

 Barber's ranch, chiefly north of the river: 



[3] October 25, 1905 



