| Sub-Family | 1.—The Partridges (Perdicinæ). |
| " " | 2.—The Quails (Turnicinæ). |
| " " | 3.—The American Partridges (Odontophorinæ). |
| " " | 4.—The Grouse Proper (Tetraoninæ). |
| " " | 5.—The Sand Grouse (Pteroclinæ). |
FAMILY V.—THE SHEATHBILLS (CHIONIDÆ).
Sub-Family 1.—The Shore Larks (Thinocorinæ).
" 2.—The Sheathbills Proper (Chionidinæ).
FAMILY VI.—THE TINAMOUS (TINAMIDÆ).
Sub-Family 1.—The Tinamous (Tinaminæ).
ORDER VI.
OSTRICHES (STRUTHIONES).
FAMILY I.—THE OSTRICHES (STRUTHIONIDÆ).
| Sub-Family | 1.—The Ostriches Proper (Struthioninæ). |
| " " | 2.—The Kivis (Apteryginæ). |
| " " | 3.—The Bustards (Otidinæ). |