Shufeldt on the Osteology and Classification of the North American Pigeons, Woodpeckers, and Kites On the Comparative Osteology of the United States Columbidæ Shufeldt (2) Notes on the Classification of the Pigeons Shufeldt Some Comparative Osteological Notes on the North American Kites Shufeldt On the Question of Saurognathism of the Pici, and Other Osteological Notes upon That Group Shufeldt