EXPLANATION OF PLATE 20 

 All figures approximately natural size. 

 Fig. 1. Trophon perelegans, n. sp. Back view of type specimen no. 11321; 

 Santa Margarita. 



Fig. 2. Trophon perelegans, n. sp. Mouth view of a small specimen. 



Fig. 3. Trophon perelegans, n. sp. Back view showing prominent varices. 



Fig. 4a. Tegula varistriata, n. sp. Back view of type specimen no. 11316; 

 characteristic of Santa Margarita. 



Fig. 4:0. Tegula varistriata, n. sp. View of aperture and umbilicus of same 

 specimen as figure 4a. 



Fig. 5. Turritella margaritana, n. sp. Upright view of specimen no. 11312; 

 from type section of the Santa Margarita formation. 



Fig. 6. Tegula thea, n. sp. Back view of type no. 11317; showing shoulder 

 and prominent ribbing. 



Fig. 7a. Tegula thea, n. sp. Back view of a small specimen. 



Fig. 76. Tegula thea, n. sp. Basal view of same specimen as figure 7a. 



Fig. 8. Siphonalia danvillensis Clark. Bear view of specimen from Santa 

 Margarita, north of Coalinga. 



Fig. 9. Siphon-aim danvillensis Clark. Bear view of type described from 

 San Pablo group. 



Fig. 10. Fusinus fabulator, n. sp. Upright view of type specimen no. 11319 ; 

 U. C. locality 3029, Santa Margarita, Tejon Hills. 



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