46 Fossil Fishes. 



Table-case, Acantlioderma and AcantJwpleurus, occur. A species of Ostracion 

 •N°- 5 6- } ias been described from the Eocene of Monte Bolca; and Glypto- 



cepkalus appears to be another representative of the family in the 

 London Clay of Sheppey. The Gymnodonts also date back to 

 Eocene times. Pine specimens of Diodon (" Sea-hedgehogs") are 

 exhibited from Monte Bolca and the Infusorial Earth, of Oran, 

 Algeria; and the little piles of dental plates (Eig. 81), placed 

 within the mouth of the same genus, are found in the Miocene 

 of Malta, Sicily, and other localities. Fnneodon is a closely allied 

 extinct genus, from the Middle Eocene of Monte Postale, jN". Italy. 



