Studies ix Geology^ No. 3 



Plate VI. 



Figs. 1,2. Area (Scapharca) obesiformis Grzybowski. 



3,4. Area (Scapharca) crescen.s Spieker. 



5,6. Area (Anadara) septifera Grzybowski. 



7,8. Area (Anadara) nelsoni Spieker. 



9, 10. Area (Anadara) toroensis Spieker. 



