588 
PLATE LXI. 
Fic. 1. CHoMATODUS LINEARIS, Agass., . : : 
View of surface of crown from above. 
» 1a. Longitudinal section of same tooth. 
Mountain Limestone, Armagh, 0 £zx coll. Enniskillen Collection. 
Fic. 2. CHomaropus acutus, Davis, 
Front view of an example imperfect at one end. 
», 2a. Longitudinal section of the same tooth. 
Mountain Limestone, Armagh, : Lx coll. Enniskillen Collection. 
Fics. 3-5. GLossopus mMarcinatus, M‘Coy, : : 
5, 3. Anterior aspect of an example of ordinary size. 
., 3a, Longitudinal section of the same tooth. 
» 20. Posterior surface of same. 
», 4. Diagrammatic section, exhibiting the arrangement in the mouth. 
» 9. Example, with a pointed apex. 
», 9a. Side view of the same specimen. 
Mountain Limestone, Armagh, : Lz coll. Enniskillen Collection. 
Fics. 6-8, CTrENOPETALUS SERRATUS, Agass., : 
» 6a. Longitudinal section of tooth represented by figure 6. 
» 8. Posterior concave face of another specimen. 
Mountain Limestone, Armagh, F Lx coll. Enniskillen Collection. 
Fic. 9. CreNoPETALUS CRENATUS, Davis, 
,, 9a. Longitudinal section of same tooth. 
» 90. Posterior surface of figure 9, 
Mt. Limestone, Wensleydale, Yorkshire. Ez coll. Wm. Horne, Esq. 
Fic. 10. Harpacopus pentatus, Agass., . : 5 : : : 
Mountain Limestone, Armagh, : Ex coll. Enniskillen Collection. 
Fic, 11. Harpacopus ciayatus, Davis, 
Mountain Limestone, Armagh, : He coll. Enniskillen Collection. 
Ficgs. 12-16. PrraLorHyNncuus PsITTAcINuS, Agass., 
,, 12. Anterior surface of a broad and short example. 
», 13. Anterior surface of a much narrower and longer example. 
» 14. View of posterior spatulate surface of a large tooth. 
» 15. Three teeth in natural relative position, horizontally. 
,, 16. Five teeth in natural relative position, vertically. 
» 16a. Diagrammatic section through the same, showing how successive teeth become 
anchylosed to those older and smaller. 
Mountain Limestone, Armagh, : Lz coll. Enniskillen Collection. 
Fies. 17-22. Pristopus FALCATUS, Agass., . : . : 
» 17. View of the interior surface of the upper jaw. 
», 19. View of the exterior surface of the upper jaw, with the pointed apex of the 
lower one projecting in the interior. 
5, 22. Lateral view of the right side of the upper jaw. 
», 21. View of the interior surface of the lower jaw. 
», 18. View of the exterior surface of the lower jaw. 
», 20. View of the under surface of the lower jaw. 
Mountain Limestone, Wensleydale and Richmond, Yorkshire. 
Lx coll, Wm. Horne, Esq., and Reed Collection, York Museum. 
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