i KIM. ii, i. in. i:. 



Upper mandible produced backwards 

 beyond the front line of the bony 

 orbit ; inferior outline of lower 

 mandible straight or nearly so .... 



19o 



Coccothraustinc?, p. 196. 



Fig. 50. Skull of Coccothraustes vulgari*. 



Upper mandible not produced backwards 

 beyond front line of orbit ; inferior 

 outline of lower mandible with a 

 slight re-entering angle ; cutting- 

 edges of upper and lower mandibles 

 everywhere in contact 



Frinfjillmce, p. 202. 



Fig. 51. Skull of Fringilla Calebs. 



Upper mandible not produced backwards 

 beyond front line of orbit ; inferior 

 line of lower mandible greatly an- 

 gulate; cutting-edges of mandibles 



Fig. 52. Skull of Embcriza citrindla. 



not everywhere in contact, but 

 leaving a gap of greater or less 

 extent Emberiz'uux, p. lM9. 



