Description of Plate XXXIV . — continued. 



Figs. 9, 10, 11, and 12. 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 Koyal College of Surgeons. 



Fig. 9. Inner side, a, hinder end, showing the undulations of the 

 enamel-surface on the base of the crown, and the rugosely 

 reticulate surface below the summit. Drawn for comparison 

 with figs. 5 and 6 of Plate XXXIII., showing the same teeth 

 in Plagiaulax and Hypsiprymnus. 



Fig. 10. Outer side, a, hinder end. 



Fig. 11. Top aspect, showing the undulations, a, hinder end. 



Fig. 12. Section, showing the broken edge of the middle of the crown. 



Figs. 13 and 14. The right ramus of the lower jaw of the Aye-Aye 

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



a. Incisor. 



b. Molar teeth. 



c. Coronoid process. 



d. Condyle, having its articular surface below the grinding- 

 plane of molars. 



e. Angle of jaw. (The letter e has been omitted by the 

 engraver, but ought to have been placed at posterior angle 

 of lower margin, where this turns up into neck of condyle.) 



f. Conjectural dotted line. . 



Fig. 14. End-view of condyle. 



