Fig. 453a. Cockatoo's 

 beak, the dotted line show- 

 ing the position of the up- 

 per bill when raised. 



Fig. 452a. Head of dove, ce, cere; n, nostril; u, 

 upper mandible; t, tomia; d, tooth; e, culmen; p, tips 

 of mandibles; i, under mandible; go, gonys; g, gape. 



Fig. 4526. Topography of the dove. Al. alula; B, belly; Bfc, back; Br, breast; 

 C, crown; E, ear; F, forehead; L, lore: &c. greater coverts; Lc, lesser coverts; Me, 

 middle coverts: N, nape: O, occiput; P. primaries; S. secondaries; K, rump; Sr, 

 scutellate and reticulate tarsus; T, tail; Ta, tertiaries; Tc, tail-coverts; Th, throat. 



[To face page 520.] 



