Osteology of the North American Tetraonidae . g. 95.—Head of clavicle, right limb, outer aspect. Fig. 96.—Right humerus, palmar aspect. Fig. 97.—The same, anconal aspect. Fig. 98.—Right femur, posterior aspect. Fig. 99.—Left tarso-metatarsus, anterior aspect. Fig. 100.—Skeleton of adult ^, Lanius ludovicianus cxcubitorides; the left free ver-tebral pleurapoj)hyses and hiemapophyses and pectoral limb havebeen removed. Fig. 101.—The hyoid arch, from above. Fig. 102.—The lower mandible, from above. Fig. 103.—The pelvis, from above. Fig. 104.—Superior aspect of skull, the lower mandible having bee
Osteology of the North American Tetraonidae . g. 95.—Head of clavicle, right limb, outer aspect. Fig. 96.—Right humerus, palmar aspect. Fig. 97.—The same, anconal aspect. Fig. 98.—Right femur, posterior aspect. Fig. 99.—Left tarso-metatarsus, anterior aspect. Fig. 100.—Skeleton of adult ^, Lanius ludovicianus cxcubitorides; the left free ver-tebral pleurapoj)hyses and hiemapophyses and pectoral limb havebeen removed. Fig. 101.—The hyoid arch, from above. Fig. 102.—The lower mandible, from above. Fig. 103.—The pelvis, from above. Fig. 104.—Superior aspect of skull, the lower mandible having been removed. I SMITHSONIAN INSTITUTION LIBRARIES 3 9088 00670 1577. ART. XIII.—Osteologry of the IVortli American Tetra- onidae. By R. W. Shufeldt, M. D., First liieiit. Med. Dept. V. S. A. As far as the Tetraonidce are represented in our avi-fauna, and thevarieties are not few in number, there has been but little question amongmodern ornithologists as to the place they should occupy, and the man-ner in which they should be classified and arranged. In the writings ofthat distinguished naturalist, my friend Dr. Cones, we find him adher-ing to the excellent and natural division of the Family into the two sub-families, Tetraonince, the true Grouse, and OdontophorinWy the Partridges,with their genera and species, truly stating, as he does so, that the inter-relation among the various representatives is so close that no violenceis ofiered by the arrangement. Our labors have been confined princi-pally to the study of the osteology of the Grouse, a complete collectionof which we have before us, and in this memoir we will only occasion-ally refer to the ostosteologyofnorth00shuf
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