540 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxii. 



Fig. 3a. Interior of left valve of same specimen. 



36. Outline of ears of right valve of same species. 



4. Glycymeris veatchii Gabb var. major Stanton. Cat. No. 165003, U.S.N.M. 



Imperfect left valve; longitude, 30 mm. Eocene, Rock Creek. Los Angeles 

 County. Found in the lower Eocene (Martinez formation) in California. 



5. Cardiwn breiverii Gabb. Right valve; longitude, 51 mm. Common in the 



Eocene (Tejon formation and equivalents). 



6. Teredo sp. Cat. No. 164972, U.S.N.M. Imperfect section of tube, lateral 



view; diameter, 11 mm. Eocene, Sisar Creek, Ventura County. 

 6a. Same species as fig. 6. Cat. No. 164972, U.S.N.M. Cross section of a 

 crushed specimen ; maximum diameter, 15 mm. Same locality as fig. 6. 



7. Fiisns remondii Gabb. Front view; altitude, 41 mm. Common in Eocene 



(Tejon formation and equivalents) on West Coast. 

 7a. Magnified view of surface of original of fig. 7. 



8. Amauropsis alveahis Conrad. Cat. No. 165000, U.S.N.M. Front view of 



partially decorticated specimen; altitude 32 mm. Eocene, Rose Canyon, 

 San Diego County. A characteristic Eocene gasteropod in California. 



9. Morio {Sco7ma) tuberculatus Gabb. Cat. No. 164999, U.S.N.M. Front view 



of an imperfect and decorticated specimen; altitude 27 mm. Eocene, Rose 

 Canyon, San Diego County. Perfect specimens have an anteriorly plicate 

 plate over the inner lip; outer lip crenulate; revolving lines on surface. 

 10. ('iilichna eostata Gabb. Cat. No. 165001, U.S.N.M. Front view of slightly 

 imperfect specimen; altitude 18 mm.; twice natural size. Eocene, Rose 

 Canyon, San Diego County. Common in the Eocene (Martinez and Tejon 

 formations and equivalents) in California. 



Plate XL. 



Fig. 1. Pecten {Li/ropeden) bowergi Arnold. Collection Univ. California. Holotype. 

 Right valve; altitude 150 mm. ; about two-thirds natural size. Lower Mio- 

 cene, Santa Inez Mountains, Santa Barbara County. Also abundant at 

 same horizon in Santa Monica Mountains and elsewhere. The left valve 

 of this species is more convex than the right, but otherwise is very similar. 



2. Ostrea titan Conrad. Cat. No. 164987, U.S.N. 31. Side view of both valves; 



altitude of large valve 131 mm. ; two-thirds natural size. Lower Miocene, 

 3 miles south of Calabasas, Los Angeles County. This species is found in 

 both the upper and lower Miocene, and often grows to a length of 20 

 inches (500 mm. ). (See Plate XLV, fig. 2. ) 



3. Purpura edtnondi, new species. Cat. No. 164983, U.S.N.M. Holotype. 



Aperture view; altitude 19 mm.; about IJ times natural size. Lower 

 Miocene, 3 miles south of Calabasas, Los Angeles County. 

 3rt. Reverse view of same specimen as fig. 3; same enlargement. 



4. Chlorostoma {Oinphalius) dalli, new species. Cat. No. 164984, U.S.N.M. 



Holotype. Aperture view; latitude 12.5 nun.; IJ times natural size. 

 Lower Miocene, 3 miles south of Calabasas, Los Angeles County. A com- 

 mon species in this horizon. 



4«. Top view of same specimen. 



4b. Base view of same specimen. 



5. Chlorostoma (Omphalius) dalli var. inornatm, new variety. Cat. No. 164986, 



U.S.N.M. Holotype. Top view; latitude 13.5 mm.; IJ times natural 

 size. Same locality as fig. 4. 



6. Chlorostoma {Omphalius) dalli var. sxbnodosns, new variety. Cat. No. 164985, 



U.S.N.M. Holotype. Top view; latitude 13 mm.; 1| times natural size. 

 Same locality as fig. 4. 

 6a. Base view of same specimen as fig. 6. 



