42 [April, 1846. 



de ces dents me fait presumer que c'est du calcaire grossiere." Note, p. 250, 

 torn. iii. 



3. Charcharodon leptodon, Ag. Eocene, S. C. Locality unknown. Ag. 



4. Charcharodon megalotis, Ag. Eocene, S. C. Tertiary. Ag. 



5. Charcharodon productns, Ag. Eocene, S. C. Swiss molasse. Eocene 



Ag. 



6. Charcharodon sidcidens, Ag- Eocene, S. C. Tertiary. Ag. 



7. Chorcharodon angusiidens, Ag. Eocene, S. C. Tertiary of Kressen- 



burg. Ag. 



8. Charcharodon heterodon, Ag. Eocence, S. C. Tertiary of Normandy. 



Ag. 



9. Charcharodon semis err atus, Ag. Eocene, S. C. Isle of Malta. Ag. 



10. Charcharodon turgidus, Ag. Eocene, S. C. Sands of Flonheim. Mio- 



cene. Ag. 



11. Charcharodon lanceolalus, Ag. Eocene, S. C. Ferruginous sand, Kres- 



senburg. Ag. 



12. Charcharodon poli/gurus, Ag. Eocene, S. C. Swiss molasse. Eocene. 



Ag- 



13. Charcharodon auriculatus, Ag. Eocene, S. C. Dax. Miocene. Ag. 



14. Charchorodo?i Mortoni, Gibbes. Eocene, S. C. New. 



This tooth is four inches long, three inches across the root, an inch and a 

 half thick from the most prominent part of its anterior surface ; it is inequi- 

 lateral, with fine uniform dentelures ; both the anterior and posterior sur- 

 faces are convex, though the former trebly so ; the enamel is thin and 

 cracked in striae, similar to the Lamna elegans ; the root or basilar bone i3 

 very thick and concave ; the right extremity slightly exceeding the left. 



I propose to name this fine species after Dr. S. G. Morton, who was the 

 first to illustrate our Tertiary Geology. 



15. Corax (galeus) pristodontus, Ag. Eocene, S. C. Chalk of Maestricht. 



Ag- 



16. Corax ("galeus) (new?) Eocene, S. C. 



IT. Oaleocerdo minor, Ag. Eocene, S. C. SwiBS molasse. Ag. 



18. Galeocerdo latidens, Ag. Eocene, S. C. Unknown. Ag. 



19. Hemipristis serra, Ag. Eocene, S. C. Swiss molasse. Ag. 



20. Hemipristis paucidens, Ag. Eocene, S. C. Unknown. Ag. 



21. Lamna elegans, Ag. Eocene, S. C. Crag and London clay. Ag. 



22. Lamna crassidens, Ag. Eocene, S. C. Inferior oolite, &c. Ag. 



23. Lamna Hopei, Ag. Eocene, S. C. Isle of Sbeppy. Eocene. Ag. 



24. Lamna cuspidala, Ag. Eocene, S. C. Swiss molasse. Ag. 



25. Otodus macroius, Ag. Cretaceous, N. J. London clay. Ag. 



26. Otodus appendicular, Ag. Eocene, S. C. Chalk. Ag. 



27. Otodus apiculatus, Ag. Eocene, S. C. Calcaire de Veteuil. Eocene ? 



Ag. ' 



28. Otodus obliquus, Ag. Eocene, S. C Characteristic of London clay. 



Ag. 



