236 NEW YORK STATE MUSFUM 



12 Direct superior aspect of the skull ofCallipepla squa- 

 ma t a ; mandible removed ; the same specimen as shown in plate 

 I, figure I. 



13 Direct left lateral aspect of the cranium of C o 1 i n u s v i r - 

 g i n i a n u s . All the bones removed save the two nasals, and 

 these are somewhat tilted up from their normal positions. 



14 Superior view of the cranium of a large male specimen of 

 Centrocercus urophasianus. All the bones of the 

 skull, including the mandible have been removed, save the nasals and 

 premaxillary, and these latter are articulated in situ. A lateral view 

 of this skull is given in my Osteology of the Tctraonidae with other 

 bones of the skeleton [Hayden's 12th An. Rep't, p. 704, pi. 6, fig. 52]. 



15 Direct superior aspect of the skull of Centrocercus 

 urophasianus (subadult, " bird of the year "). Mandible 

 removed. Shows very well the sutures among the cranial and facial 

 bones, and the foramen corresponding to the " posterior fontanelle " 

 of human anatomy. A lateral view of this skull is given.,in my 

 Ostcoloj^y of the Tctraonidae, with other bones of the skeleton 

 [iJ. S. Geol. & Lreog. Sur. Terr. Hayden's 12th An. Rep't, 1883. pt i, 

 p. 702, pi. 5, fig. 50]. The skulls of the Sage cocks shown in this 

 figure and figure 14 were collected by the author in Wvoming in 

 1879. 



16 Basal aspect of the skull of Centrocercus uropha- 

 sianus ; mandible removed. From a large female specimen col- 

 lected by the author in Wyoming in 1879. 



17 Basal aspect of the skull of Loj^hortyx gambeli ; 

 mandible removed. Same specimen as shown in plate i, figure 4.- 



18 Basal view of the skull of Phasianus colchicus. 

 Same specimen as shown in plate i, figure 6 of this bulletin. Man- 

 dible removed. 



19 Basal view of the skull of Argus g i g a n t e u s . ]\Ian-' 

 dible removed. Same specimen as shown in plate i, figure 11, of 

 this bulletin. 



