68 R. W. SHUFELDT, 
Coll. U. S. Nation. Mus.). Median longitudinal length of sacrum equals 
154 mm. 
Fig. 80. Dorsal aspect of the pelvis of Chen coerulescens Adult 
(No. 18613, Coll. U. S. Nation. Mus... Much reduced. Median longi- 
tudinal length of sacrum equals 110 mm. 
Fig. 81. Ventral aspect of the sternum of Branta canadensis 
with the costal ribs of the left side attached thereto. Much reduced. 
From the same skeleton which furnished the pelvis shown in Fig. 79 of 
this Plate, and reduced in the same proportion. 
Plate 11. 
Fig. 82. Inner aspect of the left pelvic limb of a specimen of 
Dendrocygna autumnalis, adult 9. Collected by Mr. F. B. ARMSTRONG, 
Brownsville, Texas. Complete and, natural size. Introduced to show the 
difference of the podothecae of the feet as compared with that in the 
Wood Duck (Fig. 83). Preparation partly ligamentous. 
Fig. 83. Inner aspect of the left foot of a specimen of the Wood 
Duck (Aix sponsa). No. 18512, Coll. U. S. Nation. Mus. Introduced 
for comparison with the foot shown in Fig. 82 of this Plate. In Dendro- 
cygna the tarsi are largely reticulated, while in Aöx they are scutellated. 
Fig. 84. Dorsal view of the pelvis of a specimen of the Chinese 
Mandarin Teal (Aix galericulata). Adult; natural size (Coll. U. S. Nation. 
Mus. No. 7371): 
Fig. 85. * Imperfect skull of Air galericulata; superior view. Nat. 
size (Coll. U. S. Nation. Mus. No. 18271). ‚Imperfect, Mandible removed. 
Same bird that furnished the pelvis shown in Fig. 84. 
Fig. 86. Inner surface of left tarso-metatarsus of STELLER’s 
Eider (Polysticta stelleri) (No. 15272, Coll. U. S. Nation. Mus.). Nat. size. 
Same bone as the one shown on anterior view in Plate 9 Fig. 56. 
Fig. 87. Left lateral view of the skull and mandible (detached) 
of Polystieta stelleri. Adult. Nat. size. Occipital area cut away; other- 
wise perfect (No. 15272, Coll. U. S. Nation. Mus.). 
Fig. 88. Antibrachium and manus of Polysticta sielleri. Palmar 
aspect. Nat. size. From the same skeleton that furnished the skull shown 
in Fig. 86 and other bones. 
Fig. 88°. Anconal side of right humerus of an extinct Brant 
(Branta propingua SHur.). Fossil from the Oregon Desert. Nat. size. 
Nearly perfect. 
Fig. 89—92. Bones from fossil specimens of Anser albifrons gambeli. 
Fig. 89, anterior surface of a right femur; Fig. 90, anterior surface of 
a Tight coracoid; Fig. 91, posterior Surface of a left coracoid; 
Fig. 92, proximal part of a right carpo-metacarpus, anconal view. 
All natural size. Figs. 88—92 photos by the author from the specimens, 
and illustrate his work on fossil Pleistocene birds of Oregon. 
