THE ORDERS. 



6l 



screamers ; XX. Cathartidiformes, the turkey-vultures ; XXI. 

 Serpentariiformes, the secretary-birds ; XXIV. Psittaciformes, 

 the parrots ; XXVI. Trogoniformes, the trogons ; XXIX. Eurylae- 

 miformes, the broadbills ; and XXX. Menuriformes, the lyre-birds. 



AVES. 

 Sub-class — ■ 



1. Saurur^ — as Gastomithidae, only found fossil. 



2. Neornithes — modem birds. 



Section A — Ratitse, as the Ostrich, none British; 

 Section B — Carinatae — with keeled breastbone. 



