PLATE XIII. 
Knoxville (Cretaceous) and Tejon (Eocene) Fossils. 
(Unless otherwise indicated all figures are natural size.) 
Fig. 1. Aucella piochii Gabb. U.S.N.M. 30831. Right valve; altitude 25 mm. View 
of exterior. Knoxville (lower Cretaceous) formation, East Fork Tepus- 
cpiet Creek (4173). Characteristic of the lower Cretaceous throughout 
the Coast Ranges. 
Fig. 2. Aucella piochii Gabb. U.S.N.M. 30831. Left valve; altitude 15 mm. View 
of exterior, X 2. Same locality and horizon as fig. 1. 
Fig. 3a. Aucella piochii Gabb. Left valve; altitude 27 mm. View of exterior. Bull. 
U. S. Geol. Survey No. 133, 1895, pi. 4, fig. 6. 
Fig. 35. Exterior of right valve of same specimen. Op. cit., pi. 4, fig. 7. 
Fig. 4. Venericardia planicosta Lamarck, U.S.N.M. 164973. Left valve; longitude 84 
mm. Eocene, Little Falls, Wash. This is the most widespread and 
characteristic Eocene species in the world. 
Eig. 5a. Turritella (martinezensis Gabb) var. f lompocensis Arnold. Paratype. Alti¬ 
tude of fragment, 30 mm. Back view. Same locality as fig. 8. 
Fig. 55. Basal view of same specimen. 
Fig. 6a. Pecten (Chlamys) yneziana Arnold. U.S.N.M. 165313. Type. Right valve; 
altitude 64 mm. View of exterior. San Julian ranch (4507). Charac¬ 
teristic of this horizon. 
Fig. 65. Same species. Length of hinge of right valve 25 mm. 
Fig. 7. Turritella uvasana Conrad. U.S.N.M. 165326. Altitude of imperfect specimen 
68 mm. Aperture view. San Julian ranch (4507). Characteristic of 
the Eocene throughout the Coast Ranges. 
Fig. 8. Turritella (martinezensis Gabb) var. f lompocensis Arnold. U.S.N.M. 165316. 
Type. Longitude 68 mm. View of back. Southwest of Lompoc (4509). 
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