CHCEKOPOTAMUS CUVIERI. 415 



which indicate a nearer approximation in the extinct genus 

 to the carnivorous type ; and it is of great interest to find 

 that the ramus of the jaw, so fortunately extracted in an 

 almost entire state from the Isle of Wight strata, exhibits 

 a structure in the prolongation backwards of the angle of 

 the jaw, which has hitherto been found to characterize, 

 almost exclusively, the carnivorous Mammalia. Certain it 

 is that no known pachydermal, or other ungulate species 

 of Mammal presents this conformation. The figure (163) 

 precludes the necessity of a detailed description of this 

 process ; it is more compressed and deeper than in the 

 Bear, Dog or Cat tribe, and is not bent inwards in the 

 way which peculiarly characterizes the marsupial jaws, and 

 which so neatly distinguishes the Stonesfield Phascolo- 

 there. The condyloid process in the CJioeropotamus is 

 raised higher above the angle of the jaw than in the true 

 Carnivora, and it is less convex than in the Hog or Peccari. 

 In the size of the coronoid process the Peccari exceeds the 

 true Hogs ; and in that respect, as well as in the form and 

 position of its canine teeth, makes a nearer approach to the 

 carnivorous type ; but in the Chceropotamm the coronoid 

 process is still more developed in correspondence with the 

 greater bulk of the temporal muscle, the size of which is 

 indicated by the span of the zygomatic arches. In the 

 wavy outline of the inferior border of the lower jaw, the 

 Peccari alone, amongst the Hog tribe, resembles the Chcero- 

 potamus. The two detached molars of the lower jaw de- 

 scribed by Cuvier, and which he compares with the third 

 and fourth molars of the Babyroussa, are the fourth and 

 fifth, or penultimate, m 2, and antepenultimate, m 1, 

 molars, counting backwards, of the Cheer opotamus, and 

 correspond with the penultimate and antepenultimate 

 grinders of the Peccari. The last molar of the lower jaw, 



