PLATE VII. 



Page. 



Figs. 1-3. Artica compacta (White) 17 



Fig. 4. Meretrix leonensis? (Con.) 18 



Fig. 5. Fistulana ruperti n. sp 19 



Fig. 6. Tubes of Fustulana ruperti 19 



Fig. 7. Stearnsia robinsi White . 17 



Figs. 8, 9. . Tapes austinensis n. sp 19 



42 



