668 



Fossil Remains of the Dddupifr Collection. 



[Oct. 



Besides the foregoing fossil species, the existence of another is in- 

 dicated by a cranium, of which fig. 6, Plate B, represents the left half 

 of the palate : the fossil is unfortunately imperfect ; the molars of the 

 right maxillary are all broken, and of those on the left side the 6th 

 and 7th are alone perfect. These are smaller than the analogous 

 molars of the former, — smaller even than those of the existing species, 

 and also present other differences besides those of length and breadth : 

 their detrition does not take place in the same manner ; for the 8th 

 molar is but little worn, notwithstanding that the 7th is fully deve- 

 loped ; in the larger fossil species the 6th would have been much 

 worn down. The 9th molar resembles in its tapering form that of the 

 common hog, but is posteriorly much less complicated, fewer tuber- 

 cles entering into its body ; it is not in the fossil quite perfect, one of 

 the anterior collines being broken off : there is, however, sufficient of 

 the tooth to warrant these remarks. The 6th molar is composed of the 

 same number of collines as that of the common hog, but these, as 

 also the inner side of the tooth, generally are less channelled. The 

 head appears to have been short, for the nasals gain breadth more 

 rapidly as they ascend, and the anterior extremities of the channels 

 from the foramina on the frontals are perpendicularly over the 3rd, 

 instead of being over the anterior of the 6th molar, as in the Sus 

 scrofa. The occiput being broken off, the length of the head can 

 only be guessed by paying attention to these minor considerations. 



The above specimen is the only one in our collection of this variety ; 

 we shall therefore content ourselves with noting its existence amongst 

 the fossil species ; and in the event of further discoveries adding to its 

 exemplars, we shall recur to the subject. 



Measurements of Lower Jaws. 



Length from post, of ramus to anterior 



extremity of symphysis, 



Ditto of symphysis on mesial line, .... 



Space occupied by seven molars, 



Molars measured along their"! 1st. 

 centres, J 2nd. 



3rd. 



4th. 



5th. 



6th. 



7th. 

 Greatest breadth, 1st. 



2nd. 



3rd. 



4th. 



5th. 



6th. 



7th. 



Existing 



Fossil, 



species. 



Fig. 4, PI. C. 



10,62 



11,65 



3,25 



3,27 



5,40 



6,15 



0,30 



0,35 



0,41 



0,52 



0,48 



0,57 



0,52 



0,60 



0,51 



0.50 



0,76 



1,05 



1,53 



1,94 



0,13 



0,21 



0,18 



0,27 



0,27 



0,33 



0,36 



0,45 



0,47 



0,57 



0,60 



0,69 



0,66 



0,76 



Fossil, 

 Fig. 3, PI. C. 



3,00 



0,35 

 0,50 

 0,62 

 0,70 

 0,71 

 1,23 



0,20 

 0,27 

 0,36 

 0,51 

 0,54 

 0,72 



