. Bulletin of the United States Geological Survey--The Santa Clara Valley, Puente Hills and Los Angeles Oil Districts. ,, ,• wl. EOCENE PELECYPODA AND GASTEROPODA. PLATE Pelecypoda and Gasteropoda. Fig. 1. Pecten (Lyropecten) bowersi Arnold. Univ. California. Type. Right valve*altitude 150 mm.; about two-thirds natural size. Lower Miocene, SantsInez Mountains, Santa Barbara County. Also abundant at same horizonin Santa Monica Mountains and elsewhere. Left valve of this speciesimore convex than right; otherwise very similar. Fig. 2. Ostrea titan Conrad. 164987. Side view
. Bulletin of the United States Geological Survey--The Santa Clara Valley, Puente Hills and Los Angeles Oil Districts. ,, ,• wl. EOCENE PELECYPODA AND GASTEROPODA. PLATE Pelecypoda and Gasteropoda. Fig. 1. Pecten (Lyropecten) bowersi Arnold. Univ. California. Type. Right valve*altitude 150 mm.; about two-thirds natural size. Lower Miocene, SantsInez Mountains, Santa Barbara County. Also abundant at same horizonin Santa Monica Mountains and elsewhere. Left valve of this speciesimore convex than right; otherwise very similar. Fig. 2. Ostrea titan Conrad. 164987. Side view of both valves; altitudeof large valve 131mm.; two-thirds natural size. Lower Miocene, 3 milessouth of Calabasas, Los Angeles County. This species is found in botlthe upper and lower Miocene, and often grows to a length of 20 inches (50Cmm.) .See PI. XXXII, fig. 2.) Fig. 3. Purpura edmondi Arnold. 164983. Type. Aperture view; alti-tude I!) nun.; about i;\ times natural size. Lower Miocene, :! unletsouth of Calabasas, Los Angeles County. Fig. 3a. Reverse view of same specimen as fig. 3; same enlargement. Fig. !. Ch
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