66 R. W. SHUFELDT, 
Fig. 50. Anterior aspect of the right tarso-metatarsus. Extreme 
length equals 62 mm. 
Fig. 51. Dorsal aspect of pelvis; some of the posterior dorsal 
and pelvic ribs; and the last cervical vertebra and the five 
dorsal vertebrae. When viewed from above, as in the figure, it will 
be observed that the anterior part of the pelvis of this skeleton is 
curiously twisted to the left. This distortion is still more perceptible 
upon the ventral aspect of the bone, as it exhibits the way in which the 
leading sacral vertebrae are involved. 
Fig. 52. Right pectoral limb of a specimen of Dendrocygna 
autumnalis, 2 (453), viewed upon anconal aspect. Collected by Mr. 
F. B. ARMSTRONG, Brownsville, Texas. Natural size. 
Fig. 53. Basal view of the skull of a specimen of Dendrocygna 
bieolor, &. Mandible removed. Nat. size. Adult. Collected by F. B. 
ARMSTRONG (456). 
Fig. 54. Basal view of the skull of a specimen of Dendrocygna 
autumnalis, 2. Adult. Nat. size. Mandible removed. Collected by 
F. B. ARMSTRONG, Brownsville, Texas (454). 
Fig. 55. Dorsal aspect of pelvis and caudal vertebrae in- 
cluding pygostyle. Dendrocygna bicolor, from the same skeleton which 
furnished the skull shown in Fig. 53 of this Plate. Nat. size. 
Plate 9. 
Fig. 56. Left tarso-metatarsus, anterior surface, ofa STELLER’s 
Eider (Polystiete stelleri). About natural size. Adult (No. 15272, Coll. 
U. S. Nation. Mus.). 
Fig. 57. Oblique antero-superior view of the shoulder girdle 
of Polysticte sielleri. Same skeleton as the one which furnishes the other 
bones of this eider here figured. 
Fig. 58. Left pelvic limb (femur, patella, tibio-tarsus 
and fibula) of Polystiete stelleri (see Figs. 56, 57). About nat. size; 
external aspect. 
Fig. 59. Superior view of the lower mandible en Polystiete 
stelleri... About nat. size. Adult (Figs. 56—58). 
Fig. 60, 61. Left lateral views of skulls, leading cervical 
vertebrae etc. of specimens of Old-squaw Ducks (Harelda hyemalis) 
Almost natural size. Adults. (Both have the same number, i.e. No. 19467, 
Coll. U. S. Nation. Mus.) The sclerotal ring of bones is in situ 
in Fig. 60, and in it the mandible is articulated. It also has attached 
to itthe atlas, axis, and third, fourthand fifth cervicals. This 
note also applies to Fig. 61; but here the sclerotal ring has been 
removed, and there is one less cervical vertebra (the fifth). Portions of 
the horny covering have been left on the upper mandibles. Nat. size. 
Fig. 62. Left humerus of STELLER’s Eider (Polystiete stelleri). 
