122 



DISTINCTION INTO SPECIES. 



Since the skeleton of the Mastodon Giganteus has become well known, the 

 bones of other animals of the same race exhibiting some differences have 

 been discovered in various countries ; and, on the ground of these differences, 

 the number of species has been increased to more than twenty. 



The following is a list of the species of Mastodon as proposed by 

 different authors : — 



1. 



Mastodon Gisranteus 



13. 



Mastodon 



Dubius 



2. 



5} 



Tetracaulodon 



14. 



j» 



Sivalensis 



3. 



V 



Andium 



15. 



» 



Perimensis 



4. 



<• 



Humboldtius 



16. 



)j 



Australis 



5. 



)! 



Angustidens 



17. 



» 



Turicensis 



6. 



71 



Longirostris 



18. 



?) 



Cuvieri 



7. 



)! 



Arvernensis 



19. 



)> 



Jeffersonii 



8. 



)! 



Tapiroides 



20. 



)i 



Borsonii 



9. 



;? 



Minutus or Minor 



21. 



!! 



Godmani 



10. 



?) 



Latidens 



22. 



)) 



Oollinsonii 



11. 



), 



Elephantoides 



23. 



)J 



Chapmani 



12. 



)> 



Intermedins 









To these must be added the subdivision of the species Tetracaulodon 

 into — 



