PLATE \1I 



[All the Figures in this Plate are slightly enlarged; one-sixteenth (approx.) ] 



Fig. 48. Anconal aspect left humerus of Phalacrocorax iirilc adult. No. 18050. 

 Coll. U. S. Nat. Mus. 



Fig. 49. Anconal aspect of the proximal end of the left humerus (fossil) of 

 Gracidavus velox Marsh (Type). See Figure 33 of Plate VI above. 



Fig. 50. Anconal aspect of the left humerus of Hceniatopus (niger) hacknuiiii. 

 Adult. No. 1.^636. Coll. U. S. Nat. Mus. 



Fig. 51. Anconal aspect of the left humerus of a specimen of Orlhorbampus 

 magnirostris. Adult. Distal third broken off. Numbered 19649, Coll. U. S. 

 Nat. Mus. (but it does not belong to the skeleton so numbered, as the latter has 

 two perfect humeri without it; or else it does belong to it, and, having been broken 

 by a shot, an additional bone (humerus, left side), was made to take its place, 

 bearing the same number) . 



Fig. 52. Anconal aspect of the left humerus of Phalacrocorax carbo. Adult. 

 No. 18851. Coll. U. S. Nat. Mus. 



Fig. 53. Anconal aspect of proximal fragment of right humerus (fossil) of 

 Graculamis ptimilus Marsh (Type). (See Figure 34, Plate VL) 



Fig. 54. Anconal aspect of the right humerus of Pliitohcla minor. Adult. 

 No. 96635. Coll. U. S. Nat. Mus. 



Fig. 55. .\nconal aspect of the left humerus of Uria lomvia. Coll. U. S. Nat. 

 ]\Ius. x\dult. 



90 



