234 NEW YORK STATE MUSEUM 



i Right lateral view of the skull of Callipepla squa- 

 ma t a , with mandible naturally articulated. New Mexico. 



2 Left lateral view of the skull of Bonasa umbellus. 

 Slightly rotated so as to give a subbasal aspect, and show both 

 quadratojugal bars and other bones on the far side. Collected in 

 1880, by Prof. Lesley A. Lee of Bowdoin College, at Brunswick, 

 Maine. Mandible removed. 



3 Right lateral view of the skull of C r ytonyx m . 

 m e a r n s i ; mandible removed. Central New Mexico. 



4 Direct right lateral view of the skull of Lophortyx 

 g a m b e I i ; mandible removed. New Mexico. 



5 Direct lateral view of the skull of Lophortyx califor- 

 n i c u s . Mandible removed. Coast region of California. Note the 

 difference in form of this skull and the one ofC. squamata 



[fig. 1]. 



6 Left lateral view of the skull of P ha si anus col chic us, 

 male. Mandible removed. A slight evidence of disease is to be 

 observed immediately in front of the external narial apertures. It 

 is very marked in the bones of the remainder of the skeleton in this 

 specimen, especially in the carpometacarpii. 



7 Direct left lateral view of the skull of Thaumalea 

 p i c t a . Mandible naturally articulated, and the sclerotal plates of 

 the left eye in situ. 



8 Direct superior aspect of the skull of Crytonyx m. 

 m e a r n.s i . Mandible articulated. From a male specimen. Cen- 

 tral New Mexico. 



9 Superior view of the skull of R o 1 1 u 1 u s roulroul. 

 Mandible removed. Proximal end of quadratojugal bar broken off. 



10 Direct left lateral view of the skull of Ortalis macalli, 

 female. Mandible naturally articulated, and the sclerotal plates of 

 the eyes left in situ in the orbits. Note the large lacrymal bone in 

 this skull. 



11 Subdirect right lateral view of the skull and mandible of 

 Argus giganteus, the latter disarticulated. The mem- 

 branes of the rhinal chamber and external narial apertures have 

 not been dissected out, and show dark in the figure. The pars 

 plana is rudimentary, and the central portion of the interorbital sep- 

 tum is thin but thoroughly ossified. 



