. Bulletin of the United States Geological Survey--The Santa Clara Valley, Puente Hills and Los Angeles Oil Districts. tnmf ; ? f r 14-ifi^MK? /v Ui-f-i -*:-»:*?£/. PLIOCENE ARCAS. PLATE XXXVIII. Pliocene Pelecypoda and Gasteropoda. (Unlessotherwise slated all figures natural size) Fig. 1. Area multicostata Sowerby. 12574. Right valve; longitude 10 imm. Recent. San Diego. Found in the lower Pliocene i Fernancuformation) in the Puente Hills. Orange County, and in the vicinity oLos Angeles. Fig. 2. Cardium quadrigenarium Conrad var. fernandoensis Arnold. 164947!Type. Emperfed L
. Bulletin of the United States Geological Survey--The Santa Clara Valley, Puente Hills and Los Angeles Oil Districts. tnmf ; ? f r 14-ifi^MK? /v Ui-f-i -*:-»:*?£/. PLIOCENE ARCAS. PLATE XXXVIII. Pliocene Pelecypoda and Gasteropoda. (Unlessotherwise slated all figures natural size) Fig. 1. Area multicostata Sowerby. 12574. Right valve; longitude 10 imm. Recent. San Diego. Found in the lower Pliocene i Fernancuformation) in the Puente Hills. Orange County, and in the vicinity oLos Angeles. Fig. 2. Cardium quadrigenarium Conrad var. fernandoensis Arnold. 164947!Type. Emperfed Left valve: longitude 58 mm. Lower Pliocene (Fernando formation), Elsmere Canyon, near Newhall, Los Angeles CountyA common variety in the Lower Pliocene. The typical form with 4ribs and less obliquity is found in the Recent. Fig. 2a. Same specimen as fig. 2. View of umbos from above. Fig. 3. Area trilineata 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 < Monterey l. Fig. 3a. Same specimen as fig. 3.
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