EXPLANATION OF PLATE 23 

 All figures natural size 



Fig. la, lb. Chione eismerensis, n. sp. External view of left valve, and internal 

 view showing hinge of left valve. Univ. Calif. Loc. 1735, Elsmere 

 Canon. 



Fig. 2. Cancellaria tritonidae Gabb. The figure is of a variety showing rather 

 prominent angulation, and is similar to specimens from the Upper 

 San Pedro formation at San Pedro. Univ. Calif. Loc. 1602. 



Fig. 3. Terebra martini, n. sp. Holser Canon. Univ. Calif. Loc. 1637. 



Fig. 4a, 4b. Turris eismerensis, n. sp. Univ. Calif. Loc. 1602. 



Fig. 5. Astrodapsis fernandoensis Pack. Univ. Calif. Loc. 1602. 



Fig. 6. Gyrineum elsmerense, n. sp. Aperture view of imperfect specimen. 

 Elsmere Canon. Univ. Calif. Loc. 1601. 



Fig. 7. Turris fernandoensis, n. sp. Aperture view. Elsmere Canon. Univ. 

 Calif. Loc. 1602. 



Fig. 8. Cancellaria eismerensis, n. sp. Posterior view. Elsmere Canon. Univ. 

 Calif. Loc. 1602. 



Fig. 9a. Chione fernandoensis, n. sp. Elsmere Canon. 



Fig. 9b. Chione fernandoensis, n. sp. View showing escutcheon. Elsmere Canon. 

 Univ. Calif. Loc. 1602. 



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