. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. ShUFKLD T : OV I UK HkRODIONES. 185 So far as I have examined, this is the method of decussation in each instance, i. e., the right hand groove being the one that passes over the superior manubrial surface. It is just possible that this crossing of the coracoids may have arisen in the habit of the ancestors of the present Herons, of passing con- stantly through very narrow places, as dense cane-brakes, or such other growths of analogous character, where they probably resorted. Fig.
. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. ShUFKLD T : OV I UK HkRODIONES. 185 So far as I have examined, this is the method of decussation in each instance, i. e., the right hand groove being the one that passes over the superior manubrial surface. It is just possible that this crossing of the coracoids may have arisen in the habit of the ancestors of the present Herons, of passing con- stantly through very narrow places, as dense cane-brakes, or such other growths of analogous character, where they probably resorted. Fig. II. Left lateral view of tlie fiircula of Ardca herodias. Fig. 12. The same bone from in front. Natural size, and from the same skeleton as shown in figures 8, 9, and 10 and others. and spent the major part of their time. There would undoubtedly be an effort made many times a day to compress the body and diminish its general bulk in a transverse direction, in such situations. Moreover, the coracoids (if arranged as in most birds) would consti- tute the principal obstruction to such comjiression ; and it certainly lessens the width of the bird's body to have them crossed as they are in the Herons. If we commence sufficiently early in the life of the individual, bones and the normal position of bones may be altered. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Carnegie Museum; Carnegie Museum of Natural History. [Pittsburgh] : Published by authority of the Board of Trustees of the Carnegie Institute
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