MASTODON ANGUSTIDENS. 75 



American species. The outline of the jaw resembles very much the 

 figure in Alcide D'Orbigny's Voyage, described by Laurillard as M. 

 Andiuvi. The specimen is unpublished material, and I was therefore 

 only allowed to examine it very cursorily. The Genoese palaeontolo- 

 gists had provisionally named it Rhynchotherium, from the enormous 

 development of the beak, approaching Dinotherium.' 



