464 REFERENCES TO THE PLATES. 



PLATE XIX. 



Views of the triturating surfaces of inferior molar teeth, mostly of undetermined species of equine 

 animals, all of the natural size. In referring to the relative position of the teeth the small or rudi- 

 mental premolar is excluded from the enumeration. See page 315. 



Fig. 1. Fifth molar of the right side. Specimen from Bijou Hill. Length externally 15 lines ; 

 breadth at the triturating surface 91 lines; thickness without the cemeutum 3j lines; breadth near 

 bottom 8 lines. 



Fig. 2. Sixth or last molar of the right side. Length antero-externally 16 lines ; breadth of tritu- 

 rating surface 9 lines; thickness 3 J lines; breadth near bottom 9 lines. 



Fig. 3. A complete series of molars of the right side, all of which belonged together except the 

 first one. 



Fig. 4. A complete series of molars of the right side. 



Fig. 5. A series of the back three molars of the right side. 



Fig. 6. A series of the anterior five molars of the right side. 



Fig. 7. Last two molars of the right side. Length of fifth 18 lines ; breadth at triturating surface 

 10 lines ; near bottom 7 lines ; thickness in former position 3i lines ; in latter 4i lines. Length of 

 sixth molar 19J lines; breadth 11 lines; thickness above 3i lines, below 4 lines. 



Fig. 8. Fourth and fifth molars of right side. Length of fourth 17 J lines ; breadth above 9 lines, 

 below 6 lines; thickness above 3* lines, below 4 lines. 



Fig. 9. Second and third molars of right side. 



Fig. 10. First and second molars of right side. Length of first 12 lines ; breadth above 8 lines, 

 below 7 lines ; thickness above 4 lines, below 4J lines. 



Fig. 11. Posterior three molars of the right side. 



Fig. 12. Anterior four molars of the left side. 



Figs. 13, 14. Sixth, fifth, and third molars of the right side; contained in a portion of the jaw of an 

 old animal. 



Fig. 15. Last molar of the left side. Length 20 lines ; breadth 9 lines; thickness 3 J lines. 



Fig. 16. Fourth molar of the right side. Length 19 lines; breadth above lOJ lines, below 7* lines; 

 thickness above 31 lines, below 5 lines. 



Fig. 17. Anterior two temporary molars, from the same specimen as the preceding. 



Fig. 18. Last two molars of the right side, contained in a fragment of a jaw of an old animal. 



Fig. 19. An intermediate molar of the left side. Length 9 lines ; breadth above 8 lines, below 7 

 lines ; thickness above 4 lines, below -ii lines. 



Fig. 20. A specimen nearly like the preceding. Length 8 lines ; breadth above 8 lines, below 7J 

 lines ; thickness above 4 lines, below 5 lines. 



Fig. 21. Another specimen nearly like the preceding, from the right side. Length 10* lines ; breadth 

 above 9 lines, below 8i lines ; thickness above 4 lines, below 51 lines. 



Fig. 22. An intermediate molar of the left side. Length 11* lines; breadth above 9 lines, below 8 J 

 lines. 



Fig. 23. Molar of the right side. Length 9 lines ; breadth above 8 lines, below 7 lines ; thickness 

 above 4 lines, below 5 lines. Specimen from Bijou Hill. 



Fig. 24. Third molar of left side, contained in a jaw fragment. 



Fig. 25. First temporary molar of the left side. 



Fig. 26. Molar of the left side. Length 11 lines; breadth above 82 lines, below 7* lines; thickness 

 above 4 lines, below 5i lines. 



