Fig. 558. — Tertiary invertebrates: //, Venericardia planticosta (Eocene); B y 

 Ostrea sellaformis (Eocene) ; C, Turritclla humerosa (Eocene) ; D, Hercoglossa tuomeyi 

 (Eocene); E, Turritclla mortoni (Eocene); F, Ecphora quadricostata (Miocene); G, 

 Volutilithes petrosus (Eocene); //, Orthaulax gabbi (Miocene); /, Pecten madisonius 

 (Miocene) ; /, Turritella variabilis (Miocene). 



