10 CLASSIFICATION OF BIRDS, 
Order COCCYGES. 
The Coceyges may be diagnosed as follows :— 
A. Palate desmognathous. B. Basipterygoid processes absent. ©. Hallux always 
present, and connected with the flevor longus hallucis, and not with the flevor 
perforans digitorum, which leads to the second, third, and fourth digits. D. Young 
born helpless and not passing through a downy stage before acquiring feathers. 

. Eurylemi. 
2 
3. 
4 




Trochili. 
. Columbe. 
8. Musophagi. 
ie Accipitres. 
Bucerotes 
Cathartes. 
18. Steganopodes, 
Galline. 
Cuculi. 
. Palamede. 
24. Tubinares. 
. Fulicarie. 
. Scansores. 
. Anseres. 
30, Pygopodes. 
| 31. 
14, Haleyones. 
19. Herodiones. 
20. Platalese. 
21. Pheenicopteri. 
99 
33. Apteryges. 
10. Serpentarii. 
34, Rhee. 
1. Passeres. 
6, Trogones. 
12. Striges. 
13. Psittaci. 
25. Impennes, 
27. Limicole. 
52. Orypturi. 
85. Casuarii. 
* * * * | 36. Struthiones. 
7 
9. 
16. 
17. 

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The arrangement of the bones of the palate, with which Huxley’s name is especially 
associated, is of great value as a taxonomic character, though it breaks down occasionally, 
like every other character. The following suborders contain species belonging to more than 
one of the modifications which are regarded as important :—Scansores, Coracix, Gavie, and 
Gralle. These modifications may be described as follows :— 
Abyithognathous.—Maxillo-palatines not coalesced with each other across the middle 
line; vomer broad and truncated in front. 
Schizognathous.—Maxillo-palatines not coalesced with each other across the middle 
line; vomer narrow and more or less pointed in front. 
Desmognathous.—Maxillo-palatines either (w) coalesced with each other across the 
middle line, or (6) united by an ossified nasal septum. 
Dromcognathous.—V omer expanded behind so as to prevent the palatines from articu- 
lating with the rostrum of the basisphenoid. 
