. Bulletin of the United States Geological Survey--The Santa Clara Valley, Puente Hills and Los Angeles Oil Districts. as fig. 3. This species appears to range over central and southern Cali-fornia in the lower Miocene. Fig. 4a. Back view of same specimen as fig. 4. Fig. 5. Sigaretus perrini Arnold. L64979. Type. Aperture view of pantially decorticated and imperfed specimen: altitude mm.; about Iftimes natural size. Lower Miocene, same locality as fig. ... Fio. (I. Turbo topangensis Arnold. L64980. Type. Aperture view; alti-tude mm.; about, 1\ times natural size. Lo
. Bulletin of the United States Geological Survey--The Santa Clara Valley, Puente Hills and Los Angeles Oil Districts. as fig. 3. This species appears to range over central and southern Cali-fornia in the lower Miocene. Fig. 4a. Back view of same specimen as fig. 4. Fig. 5. Sigaretus perrini Arnold. L64979. Type. Aperture view of pantially decorticated and imperfed specimen: altitude mm.; about Iftimes natural size. Lower Miocene, same locality as fig. ... Fio. (I. Turbo topangensis Arnold. L64980. Type. Aperture view; alti-tude mm.; about, 1\ times natural size. Lower Miocene, samllocality as fig. U. S. GEOLOGICAL SURVEY BULLETIN NO. 309 PL. XXVII. MIOCENE PELECYPODA AND GASTEROPODA. PLATE Echinoidea and Pelecypoda. Fig.]. Pecten (Amusium) lompocensis Arnold. 104852. Cotypo. Inte-rior view, showing internal lirae; altitude 90 mm.; about two-thirds natu- ral size Lower Miocene, Ojai Valley, Ventura County. This form, sofar as known, is confined to the lower Miocene of Santa Barbara and Ven-ntura counties. Fig. 2. Ostrea eldridgei Arnold. 164980. Type. View of exterior of largHvalve; altitude nun.; two-thirds natural size. Lower Miocene, sup-pposed equivalent of Vaqueros formation, Klkins ranch, east of GrimesCanyon, smith of Fillmore, Ventura County. Fig. 2a. Lateral view of same specimen as fig. 2. Fig. 3. Scutellafairbanksi Merriam. L64963. View of top, showing details;maximum diameter36 mm.; , times natural size. Lower Miocene, sup-posed equivalent of Vaqueros formation, nearTorrey Canyon wells, south-west of Iiru. Ventura County, abundant. This species is also found nearthe base
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