priety of considering the first deeply notched lamina as single or 

 double. 



" In the cranium in the CoUege Museum the number of laminee is 

 twelve, the forked one being regaided iis single. In Mr. De la 

 Fons's specimen the alveoles clearly indicate that the number of la- 

 minen of the lašt molar had been thirteen, with the rudiment of a 

 fouiteenth ; the extent of the grinding surface is, hovvever, pro- 

 portionally larger than would result from the additional lamince alone ; 

 for as these lamince do not cease to grow so long as the animal lives, 

 they increase in thickness as age advances. 



" The follovving are the admeasurements of the two crania alluded 

 to, compared with the indications to be derived from Cuvier's figure : 



Totai length of the cranium 



Totai breadth of ditto (taken from 



the outsides of the zygomata) . . 



Totai breadth of the occiput 



Length of the molar surface, upper 



jaw 



Length of the lašt alveola, ditto , . 

 Depth of ditto 



" The depth of the lašt alveola is greatest at its anterior part ; 

 being the reverse of what exists in the Elephnnt, where in conse- 

 quence of the formation of fangs, the growth of the tooth is arrested, 

 and absorption of the roots takes place as the anterior lamince are 

 worn down." 



