. Bulletin of the United States Geological Survey--The Santa Clara Valley, Puente Hills and Los Angeles Oil Districts. Conrad. 104948. Right valve of medium-size!specimen; longitude40 mm. Same locality as fig. 2. A common specie;in the Pliocene of California. Also appears to extend down as far as themiddle Miocene 0 mmSame locality as fig. 2. Fig. 5. Leda taphria Dall. 164952. Right valve; longitude 36 natural size. Same locality as fig 2. This species is common fromthe Pliocene to the Pvocenl fauna in the California province. Fig. on. Same specimen as fig. 5. View o
. Bulletin of the United States Geological Survey--The Santa Clara Valley, Puente Hills and Los Angeles Oil Districts. Conrad. 104948. Right valve of medium-size!specimen; longitude40 mm. Same locality as fig. 2. A common specie;in the Pliocene of California. Also appears to extend down as far as themiddle Miocene 0 mmSame locality as fig. 2. Fig. 5. Leda taphria Dall. 164952. Right valve; longitude 36 natural size. Same locality as fig 2. This species is common fromthe Pliocene to the Pvocenl fauna in the California province. Fig. on. Same specimen as fig. 5. View of umbos from above. Fig. 6. Neverita recluziana Petit. 164960. Back view; latitude 25 locality as fig. 2. A common species from the Pliocene to theRecent fauna: also probably occurs in the U. S. GEOLOGICAL SURVE^ 3ULLETIN NO. 309 PL. XXXVIII. PLIOCENE PELECYPODA AND GASTEROPODA. PLATE XXXIX. Pliocene Brachiopoda and Pelecypoda.(All figures natural size.) Fig. 1. Ostrca veatchii Gabb. 153827. Exterior of valve; altitude 90 Pliocene, San Diego. An abundant and characteristic species inmany of the Pliocene localities from southern California to Cerros Island,off lower (Jalifornia. Fig. 2. Callista (Amiantis) callosa Conrad. 164953. Imperfect left valve;altitude 50 mm. Lower Pliocene (Fernando formation), Elsmere Can-yon, near Wwhall, Los Angeles County. Base evenly rounded in perfectspecimens. Common from Pliocene to Recent. Fig. 3. Callista subdiaphana Carpenter. 164951. Imperfect right valve;longitude 41 mm. Same locality as fig. 2. Abundant in the Pliocene andalso found in the Recent. Fig. 4. Terebratalia smithi Arnold. L64977. Pedicle valve; longitude 42nun. Pliocene, Temescal Canyon, 3 miles north of Santa Monica, LosAngeles County. Known only from the Pliocene. A somewhat var
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