392 University of California Publications in Geology [Vol. 9 



As shown by Lindgren's descriptions given above, the eastern 

 extent of the sediments mapped as lone rest upon a very irregular 

 surface cut in the bedrock series. Several different stream channels 

 were recognized by him and he has clearly shown that the sediments 

 of Morris Ravine and the Cherokee mine are principally of 

 fluviatile origin. These sediments are the stream-laid deposits which 

 were being deposited at the same time as the marine strata along 

 the shore line a short distance further west. 



The conditions in the eastern half and in the western half of 

 the sedimentary beds beneath the Older Basalt differ very decidedly. 

 No stream deposits were observed upon the western side, but the 

 strata appear to be continuous, whereas on the eastern side the 

 sediments were deposited in definite stream-channels. During Eocene 

 times there were several short, consequent, high-grade southward and 

 westward flowing streams which plunged quickly into the Tejon 

 sea, whose shore line must have been located about half-way be- 

 tween the south slope of South Table Mountain and Morris Ravine. 

 The approximate position of this strand line is indicated upon the 

 map (see fig. 4), which is after Lindgren. 



Mr. Ruckman and the writer obtained the following species 

 from two localities which were located about a mile north of the 

 Butte County Hospital. 



List of the Fauna From the Eocene of Oeomlle South Table Mountain 



Faunal Relationships 



Turritella merriami Dickerson 

 Chrysodomus martini Dickerson 

 Turris perkinsiana (Cooper) 

 Turris inconstans (Cooper) 

 Drillia ullreyana Cooper 

 Drillia orovillensis, n. sp. 

 Murex (Ocinebra) nashi, n. sp. 

 Nyctilochus thunani, n. sp. 

 Cerithiopsis orovillensis, n. sp. 

 Turris monolifera (Cooper) 

 Surcula clarki Dickerson 

 Siphonalia sutterensis Dickerson 

 Neverita secta Gabb 

 Neverita globosa Gabb 

 Lunatia nuciformis Gabb 

 Nyctilocbus diegoensis (Gabb) 

 Cancellaria stantoni Dickerson 

 Cordiera gracillima Cooper 

 Spiroglyphus, sp. 

 Architectonica, cf. cognata Gabb 



Acmaea ruckmani, n. sp. 



Spisula tejonensis, n. sp. Packard 



Acila gabbiana, n. sp. 



Area hornii Gabb 



Barbatia, sp. a. 



Barbatia morsei Gabb 



Ostrea, sp. a. 



Ostrea, cf. appressa Gabb 



Venericardia planicosta merriami 



Dickerson 

 Modiolus ornatus (Gabb) 

 Meretrix hornii Gabb 

 Placunanomia inornata Gabb 

 Phacoides cretacea (Gabb) 

 Leda gabbi Conrad 

 Tellina, sp. 

 Tellina longa Gabb 

 Teredo, sp. 



Solen parallelus Gabb 



