EXPLANATION OF THE PLATES AND WOODCUTS. 



Fig. \a. The same ramus of the lower jaw, viewed from the outer side. The figures of the 

 crown of the canine and second false molar are given in outline from the fragment of the 

 lower jaw described by Cuvier. 



Fig. 2. Symphysis of the lower jaw of Chceropotamus Cuvieri. 



Fig. 3. 3a. The right side of the upper jaw of the Chosropotamus Cuvieri from Montmartre, 

 figured in the ' Ossemens Fossiles,' edit. 4, 8vo, 1835. pi. cxlix. fig. 1. 



It has been deemed advisable to reproduce these figures in order to dissipate the doubts 

 which have been expressed* as to whether this upper jaw actually belonged, as Cuvier 

 believed, to the same animal as the fragment of the lower jaw figured by Cuvier. 



Fig. 4. Grinding surface of the first upper molar, left side, of the Anoplotherium secundarium 

 (Cuvier). 



Fig. 5. External and internal side-view of the right upper canine of the Anoplotherium com- 

 mune, Cuv. 



Fig. 6. Grinding surface of the penultimate molar of the upper jaw of Palaotherium me- 

 dium, Cuv. 



Fig. 7. Outer and inner view of an incompletely developed crown of the penultimate molar of 

 the lower jaw of Palcsotherium crassum, Cuv. 



PLATES V. and VL 



Illustrate Mr. Owen's memoir on the Thylacotherium and Phascolotherium : p. 47 to 65. 



Plate V. 



Fig. 1. Inside view of the left ramus of the lower jaw of the Thylacotherium Prevostii, Val. 



The outline figure represents the jaw of the natural size. 

 Fig. 2. The corresponding view of the left ramus of the lower jaw of the Myrmecobius fas- 

 ciatus, Waterhouse. 



The outline figure represents the jaw of the natural size. 

 Fig. 3. Inside view of the left ramus of the lower jaw of the Thylacotherium Prevostii, Val. 

 The outline figure represents the jaw of the natural size. 



It is the original Stonesfield fossil examined by Cuvier, and figured by M. Prevost, 

 ' Annales des Sciences Nat.,' Avril 1825, pi, xviii., and by Dr. Buckland, ' Bridgewater 

 Treatise,' ii. pi. ii. fig. B. 



In each figure a indicates the condyle or condyloid process ; b, the coronoid process ; 

 c, the angle or angular process; d, the inferior longitudinal groove; e, the symphysis of 

 the jaw. 



Plate VL 



Fig. 1. Inside view of the left ramus of the lower jaw of the Thylacotherium Broderipii. 

 The outline figure represents the jaw of the natural size. 



* See the ' Palaeologicse ' of H. von Meyer, p. 53. 



