476 University of California Publications in Geology [Vol. 9] 



From all evidence it seems likely that the Tejon series is the cor- 

 relative of the Claiborne at least in part. 



All of these writers examined material which was principally 

 derived from the Tejon of Canada de las Uvas and hence their com- 

 parisons are chiefly valuable as respects the position of the Rimella 

 simplex Zone of California. 



Species Common to the Gulf and Pacific Provinces 



The number of identical species between the Tejon Eocene and 

 the Eocene of the Gulf is much smaller than the writer first supposed. 

 Many of the forms which at first sight appear to be identical reveal 

 slight differences when directly compared. These differences are in 

 general of specific or subspecific value at least. The general faunal 

 development in the Tejon is so similar to that of the Gulf Province 

 that one is easily deceived into thinking that the specific characters 

 are also alike. 



A tabular comparison between identical or congeneric species of 

 the Gulf Province and the Tejon is given below. 



Midway 

 Exilia pergracilis Conrad 

 Natica eminula Conrad 

 Protocardia nicolletti Conrad 

 Natica perspecta Whitfield 



Lignitic 

 (Wilcox formation) 

 Philene alabamensis Aldrich 

 Modiolus alabamensis Aldrich 

 Pleurotoma mediavia equiseta 



Harris 



Pleurotoma denticula Harris 

 Cypraea smithi Aldrich 

 Natica eminula Conrad 

 Calyptraea aperta Sol. 

 Venericardia planicosta regia 

 Rogers 



Venericardia planicosta var. 

 Harris 



Ancillaria staminea Conrad 

 Metula sylvaerupis Harris 

 Ficopsis penita Conrad 

 Pleurotoma roscoei Harris 

 Cadulus abruptus Aid. and Meyer 



Claiborne 

 Dentalium mississippiensis Con. 

 Oliva mississippiensis Conrad 

 Whitneya flcus Gabb 



Tejon 



= Exilia dickersoni (Weaver) 

 = Neverita secta Gabb 

 cf. Cardium marysvillensis 

 cf. Natica nuciformis 



= Megistostoma striata Gabb 



= Modiolus ornatus (Gabb) 



= Turris inconstans (Cooper) 



= Turris stocki, n.sp. 



= C. mathewsonii Gabb 



= Neverita secta Gabb 



= C. excentrica (Gabb) 



= V. planicosta hornii Gabb 



= V. planicosta merriami Dick, 



cf. Olivula marysvillensis Dick, 



cf. M. harrisi. n.sp. 



cf. F. remondii (Gabb) 



cf. Drillia cooperi, n.sp. 



= Cadulus pusillus (Gabb) 



= D. Stramineum Gabb 



= Olivella mathewsonii Gabb 



= Whitneya flcus Gabb 



