GALLI 



301 



It is evident that not much of classificatory importance 

 is deducible from the above facts. HUXLEY has used with 

 more success the remaining parts of the skeleton. 



The gallinaceous birds are divided by HUXLEY into two 

 main subdivisions, Peristeropodes and Alectoropodes. 



FIG. 152. SKULL OF Tctrao 

 urocjallus. VENTRAL VIEW. 

 (AFTER HUXLEY.) 



il.rp, maxillo-palatines ; Vo, vomer ; 

 MX, maxilla ; I'l ', palatines : 1't ptery- 

 Koi'l- ; +, kisiijterygoid facets ;fmf, 

 premaxilla. 



p.t.o 



l-X 



m.x 



FIG. 153. STERNUM OF Crax 

 globicera (AFTER HUXLEY). 

 LETTERS AS IN FIG. 72, p. 



128, WITH WHICH THIS FlGURE 

 IS TO BE COMPAKEH. 



The former contains the Cracidae and Megapodidae, the 

 latter the remaining families. 



The Peristeropodes may be thus denned : 



1. Sternum with not very deep inner notches (fig. 153) and 

 with short obtuse costal processes, the anterior edge of which 

 is at right angles to the long axis of sternum. 



2. Hallux on a level with other toes. 



