1914] Dickerson: Fauna of the Martinez Eocene of California 115 



PARTIAL LIST OF SPECIES IN THE BASAL TEJON SOUTH or MOUNT DIABLO 



(Continued) 



PteriaC?), sp. Cassidaria tuberculata (Gabb) 



Solen parallelus Gabb Ficopsis remondii (Gabb) 



Tapes conradiana Gabb Fusus californica Gabb 



Tapes, sp. Fusus diaboli Gabb 



Tapes(f) quadrata Gabb Fusus martinez (Gabb) 



Tellina cf. aequalis(?) Gabb Fusus, sp. 



Tellina longa Gabb Galerus excentricus Gabb 



Tellina remondii Gabb Littorina compacta? Gabb 



Tellina, n. sp. Lunatia hornii Gabb 



Venus (?), sp., a Neptunea(?) supraplicata Gabb 



Venus (?), sp., ~b Neptunea(?), sp. 



Venericardia planicosta Lamarck, Neverita secta Gabb 



var. hornii Gabb Olivella mathewsonii Gabb 



Yoldia(?), n. sp. Perissolax blakei Gabb 



Zirphaea(?), sp. Pseudoliva volutaeformis Gabb 



Eimella canalifera Gabb 



Dentalium cooperi Gabb Surculites, sp. 



Dentalium stramineum Gabb Turris perkinsiana (Cooper) 



Amauropsis alveata Gabb Turris, sp., a 



Bulla hornii Gabb Turris, sp., & 



Cylichna costata Gabb Turritella merriami Dickerson 



The basal Tejon in contact with the upper Martinez of the type 

 section is non-fossiliferous and on this account a direct comparison 

 with the upper Martinez is not possible. The Tejon south of Mount 

 Diablo is only ten miles away from the upper Martinez of the type 

 section, so a comparison between the two is profitable. 



The following species are common to the two : 



Cardium cooperi Gabb Dentalium cooperi Gabb 



Leda gabbi (Conrad) Dentalium stramineum Gabb 



Modiolus ornatus (Gabb) Lunatia hornii (Gabb) 



Acila, sp. Perissolax tricarnatus(?) Gabb 

 Psammobia hornii (Gabb) 



Such characteristic species as the following are not found in the 

 basal Tejon : 



Cucullaea mathewsonii Gabb Fusus aequilateralis Weaver 



Pholadomya nasuta Gabb Heteroterma gabbi Stanton 



Tellina kewi, n. sp. Heteroterma trochoidea Gabb 



Tellina undulifera Gabb Siphonalia(f) lineata Stanton 



Ampullina striata Gabb Turritella pachecoensis Stanton 



Brachysphingus liratus Gabb Urosyca caudata Gabb 

 Bullinula subglobosa Weaver 



This faunal difference would be far better shown, no doubt, if 

 better collecting places in the uppermost Martinez could be found. 



