. Bulletin of the United States Geological Survey--The Santa Clara Valley, Puente Hills and Los Angeles Oil Districts. so far known only in Fresno County andsouth. Fie. 11. Same species and locality as fig. 10. Slender variety; altitude 59 mm. Fig. L2. Same species and Locality as fig. 10. Broad variety; altitude 43 mm. Fig. L3. Turritella cooperi Carpenter () fernandoensis Arnold. Aperture view of imperfed specimen; altitude 31 mm. LowerPliocene, Fernando formation, Elsmere Canyon, near Newhall, LosAngeles County. A common form in the lower Pliocene of southernCalif
. Bulletin of the United States Geological Survey--The Santa Clara Valley, Puente Hills and Los Angeles Oil Districts. so far known only in Fresno County andsouth. Fie. 11. Same species and locality as fig. 10. Slender variety; altitude 59 mm. Fig. L2. Same species and Locality as fig. 10. Broad variety; altitude 43 mm. Fig. L3. Turritella cooperi Carpenter () fernandoensis Arnold. Aperture view of imperfed specimen; altitude 31 mm. LowerPliocene, Fernando formation, Elsmere Canyon, near Newhall, LosAngeles County. A common form in the lower Pliocene of southernCalifornia. Fig. 11. Turritella cooperi Carpenter. Collection of Delos Arnold. Aperture viewof typical form. Lower Pleistocene, lower San Pedro formation, Dead-man Island, San Pedro, Los Angeles County. Common in the Plioceneand lower Pleistocene from Ventura County southward. Fig. L5. Turritella jewetti Carpenter. Collection of Delos Arnold. Typical form,aperture view: altitude 70 mm. Same locality and horizon as fig. 14;geologic and geographic range also about the 1 rOLOGICAL SURVEY BULLETIN NO. 309 PL. XLI. TERTIARY TURRITELLAS. INDEX. Figures in italic denot v. Page. Acknowledgments to those assisting 1, 102, .tz 27 sp--. I? Actaeon i Hictaxis punctocoelata Carpenter. 27Adams Canj on, fossils near 26 oil wells in 4, 42, 45 Oil Of, analyses of 209,211,212 rocks in 43,49 Agasoma barkerianum Cooper 147 ki rnianum Cooper 147 AJiso Canyon, oil wells in 4. 42. 45, 49 Amauropsis alveatus Conrad 224 Amiantis callosa Conrad Amusium lompoeensis Arnold Analyses oi oil 209 217 methods of 205-208 Anatina sp 11 Angulus buttoni Dall 27 Anoraia lampe Cray 27 Antisell, Thomas, explorations of 138, 139 on bituminous effusions 140 Are;: 247 camuloensis Osmonl 24, . labiata Sowerby 26 multicostata Sowerby 107,152, \8 montereyana Osmont 146 trilineata Conrad 25,107, & Arnold, Ralph, bibliography compiled by. fossils determined by ,25,26 ,,n fossils of oil-bearing formations.
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