FAUNAL RELATIONSHIPS OF THE MEGANOS GROUP 139 
Odostomia, Nn. sp. SCAPHODA 
Oliva, 2 n. sp. Dentalium (cf. cooperi Gabb) 
Phos martini Dickerson Dentalium, n. sp. 
Siphonalia sutterensis Dickerson 
Scaphander, n. sp. 
Solarium, 2 i. sp. A Nautiloid, genus indet. 
Terebra, n. sp. 
CEPHALOPODA 
Turris, 5 1. sp. Neto 
Turris monolifera Cooper Turbinolia, 2 sp. 
Turritella, 2 n. sp. Flabellum, n. sp. 
Turritella merriami Dickerson Stephanophyllia, n. sp. 
Whitneya, n. sp. Dendrophyllia (?), n. sp. 
Comparison of Meganos and Tejon faunas —Up to the present 
time 68 species have been reported from the Tejon beds on the 
north side of Mount Diablo. Most of these were listed either 
by Stanton or Dickerson in the papers already referred to. This 
upper fauna, referred by Dickerson to his Balanophyllia zone, 
contains a number of the species which are typical of the type 
section of the Tejon, such as Meretrix hornit Gabb, Meretrix 
tejonensis Dickerson, Conus remondii Gabb, Ficopsis cf. cowlitzensis 
Weaver, Turritella uvasana Conrad, Turritella uvasana bicarnata 
Dickerson. 
The fauna of the Meganos as obtained from the type section 
described above is very different from that of the Tejon. Not 
more than five of the more than seventy determined species have 
been found in the Tejon as recognized in this section or known 
Tejon section. The presence of such described species as Phos 
martini Dickerson, Siphonalia sutterensis Dickerson, Turrtiella 
merriami Dickerson, Schizaster diabloensis Kew, together with a 
fairly large number of undescribed species, is the evidence for 
correlation of these beds with the Eocene of Marysville Buttes 
and Oroville, which contain the fauna of Dickerson’s Siphonalia 
sutterensis zone, and with the beds referred to the Meganos on the 
south of Mount Diablo and the other Meganos sections described 
in this paper. 
