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NEW YORK- STATE MUSEUM 



Jungle cocks, as will be seen from figure 15, have the supero- 

 posterior angle of the pygostyle drawn out into a long, spinelike 

 process and this seems to be approached by other gallinaceous 

 species, as, for example, in Centrocercus of the western plains of the 

 United States.^ 



Excepting the atlas, axis, ribs, and caudal vertebrae, I find 

 the parts of the axial skeleton which we have been considering in 

 the present section to be quite thoroughly pneumatic, perhaps some 

 portions of the pelvis being less so than any, while many of the 

 vertebrae are highly so. 



Before proceeding to the consideration of the shoulder girdle and 

 sternum, I will add here a few comparative measurements of the 

 pelves of the male and female G. b a n k i v a , employing, as 

 above, the metric scale. 



DISTANCES BETWEEN CERTAIN POINTS ON THE PELVIS 



Greatest longitudinal median length 



Greatest absolute length 



Tip of one propubis to tip of other 



Greatest absolute width 



Greatest absolute hight 



Least width 



Length of postpubis 



Distance between bases of the acetabulae 



Length of pelvic sacrum 



Greatest width of pelvic sacrum 



In making the measurements in the case of the pelvis of the 

 female in this table I was careful not to take into consideration the 

 caudal vertebrae which we found united with the sacrum in this 

 specimen. 



Sternum and shoulder girdle. So well known is the gen- 

 eral form of the sternum among typical Gallinae, and in Gallus 

 in particular, that it would be more than superfluous for me to 

 enter upon a detailed description of the bone in the present con- 

 nection. My figures faithfully portray its form in the adult male 

 G. bankiva [fig. 8, 9], and Darwin [op. cit., p. 330] has told 

 us that in the case of domestic species he found out of 25 ster- 

 nums examined by him, " three alone were perfectly symmetrical, 

 10 were moderately crooked, and 12 were deformed to an extreme 



' Shufeldt, R. W. Contributions to the Anatomy of Birds. Washington 1882. p. 710, 

 pi. 9, fig. 65, 66, and descriptions given beyond. 



