138 BRUCE CLARK 
the vicinity of Stewartville and West Hartley the conglomerates 
disappear and the chocolate shales at the base of the Tejon 
rest on the shales and shaly sandstones of division E of the 
Stewartville, making it impossible to find a sharp contact any- 
where. 
Fauna from Meganos beds——The following is a preliminary 
list of the Meganos species obtained from the section described 
above. The majority of them came from the sandstone division 
D, a few species from the fine sandstones of division E, and a 
few from the basal sandstones near the eastern border of the Mount 
Diablo Quadrangle extending into the Byron Quadrangle to the 
east: 
PELECYPODA 
Acila gabbiana Dickerson 
Antigona, 2 N. sp. 
Arca hornii Gabb, n. var. 
Avicula, sp. 
Cardium brewerit Gabb, n. subsp. 
Cardium marysbillensis Dickerson 
Corbula diletata Waring 
Corbula, n. sp. 
Crassatellites, 2 n. sp. 
Dosinia, n. sp. 
Diplodonta cretacea Gabb 
Glycimeris major Stanton, n. var. 
Leda gabbi Conrad 
Leda (cf. alaeformis Stanton) 
Marcia (?) conradi Dickerson 
Marltesia, n. sp. 
Macrocallista, n. sp. aff. M. Conradi 
Gabb 
Modiolus ornatus Gabb 
Osirea, sp. 
Psammobia, n. sp. 
Periploma, n. sp. 
Solemya, n. sp. 
Solen, n. sp. 
* Solen, n. sp. 
Spisula tejonensis Dickerson 
Spisula (cf. merriami Dickerson) 
Spisula, n. sp. 
Tellina longa Gabb 
Tellina, sp. 
Tellina rémondit Gabb 
Tivela, n. sp. 
Venericardia planicosta (cf. var. mer- 
riami Dickerson) 
GASTROPODA 
Acmaea, n. sp. 
Actaeon, 3 Nn. sp. 
Brachysphingus, 2 n. sp. 
Calliostoma, n. sp. 
Chrysodomus, 2 sp. 
Calyptraea excentrica Gabb 
Cancellaria Stantoni Dickerson 
Cancellaria, n. sp. 
Clavilithes, n. sp. 
Conus, sp. 
Cylichna, n. sp. 
Cypraea, n. sp. 
Exilia, sp. 
Ficopsis, ni. sp. 
Fusinus, n. sp. 
Galeodea sutierensis Dickerson 
Haminea, n. sp. 
Natica gestert Dickerson 
Natica hornit Gabb 
Natica, n. sp. 
Nepiunea, n. sp. 
