OSTEOLOGY OF BIRDS 2:^7;. 



Plate 6 



The specimens shown in figures 26 and 29 are from the author's 

 collection, now in the New York State Museum; those of figures 

 2y and 28 belong to the United States National Museum. They 

 are all taken upon direct dorsal view, and very slightly reduced. 

 The skull shown in plate i, figure 2, belonged to the same skeleton 

 which furnished the pelvis here shown in figure 26, and also the 

 bones shown in plate 5, figure 23. The skull shown in plate i, 

 figure 7, and the sternum shown in plate 5, figure 24, belonged to 

 the same individual which furnished the pelvis here seen in figure 

 27. The wax attaching this specimen to the glass upon which it 

 was photographed, shows through the sacral foramina. This is not 

 the case, however, with the ventral view of this same pelvis, shown 

 in plate 7, figure 30. 



The skull shown in plate i, figure 11, and plate 2, figure 19, as 

 well as the trunk skeleton shown in plate 3, figure 20, of this bul- 

 letin, are all from the same skeleton which furnished the pelvis 

 shown in the present plate in figure 28. The pelvis of the Colum- 

 bian sharp-tailed grouse ( P e d i o c a e t e s p. c o 1 u m b i a n u s ) 

 shown in figure 29 of this plate is from a specimen collected by the 

 author in central Wyoming, in 1880. These four pelves well ex- 

 emplify the variations of this part of the skeleton seen among cer- 

 tain of the Gallinae, in fact the extremes in the several species 

 compared. 



