1. Subclavian artery. 2. Coracoid artery. 3. Thoracic artery. 4. (Unnamed.) Supplies _Mm. coracobrachialis posterior_ and _sternocoracoideus_. 4a. (Unnamed.) Supplies _M. coracobrachialis posterior_. 6. Sternal artery. (Shown as it appears on _right_ side. Left sternal artery not so extensive.) 6a. (Unnamed.) Supplies _M. sternocoracoideus_. 7. (Unnamed.) Supplies _M. subcoracoideus_. 8. (Unnamed.) Supplies coracoid-sternal articulation. 9. Pectoral artery. 10. Axillary artery. 12. (Unnamed.) Supplies _M. supracoracoideus_. 14. Carotid artery. 15. (Unnamed.) Supplies _M. supracoracoideus_.] LITERATURE CITED AMERICAN ORNITHOLOGISTS' UNION 1957. Check-List of North American birds. Baltimore, Maryland, Amer. Ornith. Union, xiv + 691 pp. ASHLEY, J. F. 1941. A study of the structure of the humerus in the Corvidae. Condor, 43:184-195. BEDDARD, F. E. 1898. The structure and classification of birds. London, Longmans, Green, & Co., xx + 548 pp. BERGER, A. J. 1956. Anatomical variation and avian anatomy. Condor, 58:433-441. BHADURI, J. L., and BISWAS, B. 1954. The main cervical and thoracic arteries of birds. Series 2. Columbiformes, Columbidae, part 1. Anat. Anz., 100:337-350. BHADURI, J. L., BISWAS, B., and DAS, S. K. 1957. The arterial system of the domestic pigeon (_Columba livia_ Gmelin). Anat. Anz., 104:1-14. COUES, E. 1903. Key to North American birds. Vol. I, Fifth edit. Boston, The Page Company, xlii + 535 + [55] pp. FISHER, H. I. 1955. Major arteries near the heart in the Whooping Crane. Condor, 57:286-289. GLENNY, F. H. 1940. The main arteries in the region of the heart of three species of doves. Bull. Fan Mem. Inst. Biol., Zool. ser., vol. 10, pt. 4, 271-278. (Not seen.) 1955. Modifications of pattern in the aortic arch system of birds and their phylogenetic significance. Proc. U. S. Nat. Mus., 104:525-621. HOWARD, H. 1929. The avifauna of Emeryville Shellmound. Univ. Calif. Publs. Zool., 32:301-394. HOWELL, A. B. 1937. Morphogenesis of the shoulder architecture: Aves. Auk, 54:364-375. HUDSON, G. E., and LANZILLOTTI, P. J. 1955. Gross anatomy of the wing muscles in the family Corvidae. Amer. Midl. Nat., 53:1-44. MAYR, E. 1955. Comments on some recent studies of song bird phylogeny. Wilson Bull., 67:33-44. MAYR, E., LINSLEY, E. G., and USINGER, R. L. 1953. Methods and principles of systematic zoology. New York, McGraw-Hill Book Co., x + 336 pp. SIMPSON, G. G. 1961. Principles of animal taxonomy. New York, Columbia Univ. Press, xiv + 247 pp. _Transmitted June 24, 1963._