256 ON THE EXTINCT MAMMALIA OF 



down, and exhibit about a dozen ridges to the crown. The tusks have been about 

 five feet in length, and about a foot in circumference at their exit from the alveoli. 

 The latter, preserved among the specimens, are long, as in Elejihas primigenius, but 

 they appear more divergent than is represented to be the case in the outline figure of 

 the skull of that species, in Falconer's plates. The premaxillary gutter is deep. 

 The maxillo-premaxillary suture descends obliquely near the middle of the outer 

 side of the incisive alveolus. The breadth of the jaw at the exit of the tusks is 

 fourteen inches; just in advance of the position of the infra-orbital foramen twelve 

 inches ; at the middle of the incisive alveoli about eleven inches. 



