108 



University of California Publications. 



[Geology 



above, and these are in most cases species having- an unusually- 

 long' geological range. Altogether sixty-one species are entirely 

 confined to the Martinez. In the hills south of Martinez a section 

 was made across the western limb of the syncline. At various 

 localities along this section collections of fossils were made from 

 the Chico, Martinez and Tejon. In the lower beds a typical 

 Chico fauna was represented, while above that several successive 

 collections yielded an entirely distinct gro\ip of species. The 

 upper portion of the series represents a fauna which is clearly 

 Tejon. 



The several successive collections made across the strike of 

 the Martinez show a distinction between the faunas of the upper 

 and lower portions. The following lists represent those forms 

 occumng in the upper and lower portions in the vicinity of 

 Martinez. 



LOWER MARTINEZ. 



Foraminifera, indet. 

 Fabellum remondianum Gabb. 

 Trochocyanthus zitteli Vaughn. 

 Schizaster lecontei Merriam. 

 Area biloba, n. sp. 

 Cardium cooperi Gabb. 

 Cucullaea mathewsoni Gabb. 

 Leda gabbi Conrad. 

 Lima multiradiata Gabb. 

 Meretrix, sp. 

 Modiola merriami, n. sp. 

 Nucula truncata Gabb. 

 Pholadomya nasuta Gabb. 

 Tapes (aft'.) quadrata Gabb. 



Tellina martinezensis, n. sp. 

 Actaeon lawsoni, n. sp. 

 Cylichna costata Gabb. 

 Dentalmm cooperi Gabb. 

 Discohelix calif ornicus, n. sp. 

 Fusus aequilateralis, n. sp. 

 Neptunea mucronata Gabb. 

 Perissolax tricarnatus, n. sp. 

 Siphonalia lineata Stanton. 

 Urosyca caudata Gabb. 

 Vrosyca robusta, n. sp. 

 Xenophora zitteli, n. sp. 

 Teredo, sp. 



Turbinella crassatesta Gabb. 



UPPER MARTINEZ. 



Foraminifera nunimuloid. 



Schizaster lecontei Merriam. 

 Cancer, sp. 

 Area biloba, n. sp. 

 Cardita hornii Gabb. 

 Card in in cooperi Gabb. 

 Cucullaea mathewsoni Gabb. 

 Leda gabbi Conrad. 

 Modiola merriami, n. sp. 

 Modiola ornata Gabb. 



Nucula truncata Gabb. 

 Pholadomya nasuta Gabb. 

 Solen stanton i, n. sp. 

 Tellina martinezensis, n. sp. 

 Trlliiiu hornii Gabb. 

 Tellina undulifcra Gabb. 

 Thracia karquinesensis, n. sp. 

 Ampullina (conf.) striata Gabb. 

 Brachysphingus liratus Gabb. 

 Bull in ula subglobosa, n. sp. 



