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priety of considering the first deeply notched lamina as single or 

 double. 



" In the cranium in the College Museum the number of lamina is 

 twelve, the forked one being regarded as single. In Mr. De la 

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

 mina of the last molar had been thirteen, with the rudiment of a 

 fourteenth ; the extent of the grinding surface is, however, pro- 

 portionally larger than would result from the additional laminae alone j 

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

 they increase in thickness as age advances. 



" The following are the admeasurements of the two crania alluded 

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



Total length of the cranium 



Total breadth of ditto (taken from 



the outsides of the zygomata) . . 



Total breadth of the occiput 



Length of the molar surface, upper 



jaw 



Length of the last alveola, ditto . . 

 Depth of ditto 



" The depth of the last alveola is greatest at its anterior part j 

 being the reverse of what exists in the Elephant, 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." 



