368 



PROCEEDINGS OF THE GEOLOaiCAL SOCIETY. [JuilO 4, 



Figs. 16-19.— Posterior half of a Carnassial Tooth (pm 4) from 

 the left side of the Lower Jaw of Thylacoleo Carnifex. (Preserved 

 in the Museum of the Royal College of Surgeons.) 



17. 



16. 



18. 



:HIHI^Ry^^ 



Fig. 16. Inner side, a, hinder end, showdng the undulations of theenamel- 

 snrface on the base of the crown, and the rugosely reticulate surface 

 below the summit. For comparison with figs. 5 & 6 (page 366) ; the 

 same teeth in Plagiaulaa; and Hyjpsiprymnus. 



Pig. 17. Outer side, a, hinder end. 



Fig. 18, Top aspect, showing the undulations, a, hinder end. 



Fig. 19. Section, showing the broken edge of the middle of the crown. 



Fig. 20. — The Right Ramus of the Lower Jaw of the Aye-Aye 

 (Cheiromys Madagascariensis) ; the outer aspect. Nat. size. 



a. Incisor 



b. Molar teeth. 



c. Coronoid process. 



d. Condyle, having its articular 



surface below the grinding- 

 plane of the Molars. 



e. Angle of Jaw. 



/. Conjectural dotted line. 



g. End-yiew of condyle. 



I 



