546 FE0CEEDING8 OF THE NATIONAL MUSEUM. vol. xxxii. 



Fig. 14. Pecten {Chlaviys) hellilamellatus Arnold. Collection of Delos Arnold. Holo- 

 tj'pe. Right -smlve; altitude 18 mm. Pliocene, Pacific Beach, San Diego. 

 Known only from this horizon at this locality. 



Plate LI. 



Fig. 1. Turrildla jutrhememi^ Wtanton. Cat. No. 165002, I'. S.N. M. Back view of 

 imperfect specimen; altitude 59 mm. Eocene, Rock Creek, Los Angeles 

 County. This species is supposed to be characteristic of the Martinez 

 formation ( lower Eocene ) . 



2. Turritellauvasana Conra.d. Cat. No. 164974, U.S. N.M. Wax cast, back view ; 



altitude 41 mm. Sespe CanyQn, Ventura County. Supposed to be char- 

 acteristic of the Tejon formation (middle Eocene). 



3. Turritella uvasaim Conrad. Cat. No. 165004, U.S.N. M. Back view of imper- 



fect specimen; altitude 44 mm. Eocene, Rose Canyon, San Diego County. 



4. Turritdla ineziana Conrad ( + T. hoffmanni Gabb). Cat. No. 164964, U.S.N.M. 



Lower Miocene, supposed equivalent of the Vaqueros formation, Chaffee 

 Canyon, southwest of Piru, Ventura County. Supposed to be character- 

 istic of the lower Miocene; found from San Mateo to San Diego counties. 



5. Turritella ineziana Conrad. Cat. No. 164969, U.S.N.M. Back view of imper- 



fect specimen; altitude 36 mm. Tar Creek, north of Fillmore, Ventura 

 County. Common in the Vaqueros formation, but good specimens are hard 

 to obtain. 



6. Turritella ineziava Conrad var. sespeensis, new variety. Cat. No. 164970, 



U.S.N.M. Holotype. Aperture view of imperfect specimen; altitude 34 

 mm. Same locality as fig. 5. 



7. Turritella ocoyana Conrad. Cat. No. 164990, U.S.N.M. Back view of imper- 



fect large specimen ; altitude 60 mm. Topanga Canyon, 3 miles south of 

 Calabasas, Los Angeles County. Supposed to be characteristic of the lower 

 Miocene. Common in central and southern California. 



8. Same species and locality; altitude 58 mm. 



9. Same species and locality; altitude 32 mm. ; upper whorls. 



10. Turritella ronato Conrad. Cat. No. 164991, U.S.N.M. Back view of imper- 



fect specimen; altitude 34 mm. Same locality as fig. 7. Supposed to be 

 characteristic of the lower Miocene; so far known only in Fresno Coijnty 

 and south. 



11. Same species and locality; slender variety; altitude 59 mm. 



12. Same species and locality; broad variety; altitude 43 mm. 



13. Turritella cooper i Carpenter {yar. ) fernandoensis, new variety. Cat. No. 164957, 



U.S.N.M. Type. Aperture view of imperfect specimen; altitude 31 mm. 

 Lower Pliocene, Fernando formation, Elsmere Canyon, near Newhall, Los 

 Angeles County. A common form in the lower Pliocene of southern 

 California. 



14. Turritella rooperi Carpenter. Collection of Delos Arnold. Aperture view of 



typical form. Lower Pleistocene, lower San Pedro formation, Deadman 

 Island, San Pedro, Los Angeles County. Common in the Pliocene and 

 lower Pleistocene from Ventura County southward. 



15. Turritella jeu'etti Carpenter. Collection of Delos Arnold. Typical form, 



aperature view; altitude 70 mm. Same locality and horizon as fig. 14; 

 geologic and geographic range also about the same. * 



