1836.] Fossil Remains of the Dddupiir Collection. 667 



The specimen, not coming from an adult animal, affords no trace of 

 any friction having commenced to take place between the upper and 

 lower canines, the latter being intact : in this respect the fossil corre- 

 sponds with the existing species, in which, to judge from a skull in our 

 possession, the canines do not meet until the development of the 7th 

 molar. The posterior incisor is present in neither half of the jaw, — a 

 circumstance which fig. 4 proves to be accidental, and that the shape 

 of this incisor is peculiar and distinctive. The central incisors are 

 large, and protrude more horizontally than in the existing species. The 

 right side has been crushed towards the left side of the jaw, so that 

 the angle formed by the two halves at their symphyses cannot, from 

 this specimen, be ascertained. 



Fig. 5 is a fragment in which the 7th molar is nearly clear of the 

 jaw, and has its anterior portion a little worn, but the central and pos- 

 terior parts untouched. Nos. 3, 4, 5, and 6 are of course in a more 

 advanced state of detrition than is the case with those of fig. 3. 



The next condition illustrated is that in which the 7th molar is 

 completely developed from the maxillary and in use ; No. 6 is much 

 worn, No. 5 nearly obliterated, and Nos. 2, 3, 4, and even No. 1, are 

 in progressive wear. Fig. 4, which illustrates this state of the teeth, is 

 from a nearly perfect fossil jaw ; the specimen has lost the left condyle, 

 and has the parts adjacent to the right one broken off, as shown in 

 the profile view fig. 6 ; the left canine is snapped off close by the 

 bone, and thus presents a sectional view : the left hind incisor, though 

 not actually affixed to the specimen, was found in the same block, — a 

 fact which in connection with the general state of the specimens, 

 argues quiet deposition. 



The molars of the lower jaw, like those of the upper, bear a close re- 

 semblance to those of the existing species ; the incisors and the canines 

 are, as above noticed, distinctive ; and by reference to the table of di- 

 mensions it will be seen that the symphysis is in the fossil shorter in 

 comparison to the length of the jaw, and the angle formed by the two 

 sides is also less acute than in the common wild hog. 



From the form of the cranium, the shape of the canines and incisors, 

 and the other points in which the fossil differs from the existing 

 species of the country, a specific difference may be inferred ; for the 

 dissimilarity, although less than that which occurs between the Daby- 

 russa, the Larvatus and the Sus scrofa or common hog, is too re- 

 markable, particularly in the shape of the canines of the lower jaw, 

 to admit of the fossil being considered as a mere variety of the Sus 

 scrofa. 



4 r 2 



