contemporarij with the Dodo in Mauritius. 169 



specimen represents had powers of flight, there is the greater 

 probabihty of some stray representative being still discoverable, 

 like the Notornis in New Zealand, in some uncultivated and 

 sequestered part of the island. 



The specimen includes the ' gonys ' or symphysial part of 

 of the lower jaw, with the thicker inferior part of the two 'rami,* 

 the parts preserved measuring 2 inches in length, and 1 inch 9 

 hnes in breadth. The length of the gonys at the mid line or 

 symphysis is 1 inch, the breadth of the gonys, as far as pre- 

 served, is 1 inch 3 lines ; but the thin upper or lateral margins 

 have been broken away, at the commencement of the rami, 

 down to their thicker convex inferior border. 



The outer surface of the gonys shows a less rounded and 

 more angular transverse convexity than in the Ara's (fig. 3.) ; 



Fig. 3. 



Under or outer view of lower jaw, Ara macao (Linn.). 



the sides bend up upon the mid tract at almost the same angles 

 as in the lower mandible of the great Australian Cockatoos 

 (Microglossum) . In the breadth of the back part of the gonys, 

 and in the angles at which the lower borders of the rami 

 diverge backwards therefrom, the Maui'itian specimen also re- 

 sembles Microglosmm more than it does Ara. Near the anterior 



