PLATE LVIir. 



PAGE. 



Fi^'. 1. DiPLODUs LATus, Newb 44 



Broad fonii. 

 la, \b. Front aud side views, showing tubercle of base. 



Fig. 2. DiPLODUs coMPRESsus, Newb 45 



Front view. 



Fig. 3. DiPLODUs GRACILIS, Newb 45 



.3rt. Small t'oiiii. 



Fig. 4. Cladouis AdMixATUs, Xewb 45 



Posterior face. 



Fig. 5. Clabodus Hektzeri, Newb 40 



Posterior aspect, 

 otf. Side view and section of ct^ntral cone. 



Fig. 6. Cladodus Patteusoxi, Newb 47 



Posterior face and section of cone, 

 till. Prntile section. 



Fig. 7. Cladodus sukulatus, Newb 47 



■* Post(^rior face and section of cone. 



Fig. 8. Cladodus coNCiNrs, Newb 48 



PoRt(iiior section and base. 



Fig. 9. Cladodus PARvuLus, Newb 48 



Posteiior face and base. 

 9(1. Small form, with lateral denticles. 



Fig. 10. PoLYRHizoDus MODESTus, Newb 50 



Anterior face. 

 lOff. Profile section; 



Fig. 11. Orodus VARIABILIS, Newb '. 50 



Posteiior face of large tooth. 

 11a, 116. Crown and anterior aspects, 

 lie, llh. Views of smaller teeth of same .series. 



Fig. 12. Orodus elegantulus, Newb 41 



Crown posterior face. 

 12(1. Enlarged view of same. 



Fig. lo. Petalodus Alleghaniensis, Newb 52 



Anterior face of average specimen. 

 VM. Anterior face of small tooth. 



Fig. 14. Ctenoptvchius semicircularis, N. and W 52 



Anterior face. 



Fig. 15. Ctenodus serratus, Newb 59 



Upper surface of right ? lower teeth. 

 15(1. Profile of one of the serrated ridges. 



Fig. 16. Ctenodus SERRATUS ? Newb 59 



Small palate tooth of upper? jaw. 



Fig. 17. DiPTERUs Sherwoodi, Newb 01 



Crown surface. 

 17a. Side view. 

 176. Profile of one ridge. 



Catskill group, Tioga county, Pennsylvania. 



Fig. 18. Heliodus Leslevi, Newb 64 



Upper surface of upper ? palate tooth. Natural size. 

 Chemung group, Tioga county, Pennsylvania. 



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