. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. Part of the proventriculus of a Swan dissected. a conical shape. In the Swan they are tubuli- form ; in the Goose and Turkey they present internal loculi; in the Ostrich and Rhea these loculi are so developed that each gland forms a racemose group of follicles, terminating by a common aperture in the proventriculus. The subjoined figures from Home's Com- parative Anatomy (vol. ii. pi. Ivi.) show the different forms of the solvent or proventricular glands in different birds. Fig. 160. Eagle. Gannet. Sea-gull. Pigeon. Swan
. The cyclopædia of anatomy and physiology. Anatomy; Physiology; Zoology. Part of the proventriculus of a Swan dissected. a conical shape. In the Swan they are tubuli- form ; in the Goose and Turkey they present internal loculi; in the Ostrich and Rhea these loculi are so developed that each gland forms a racemose group of follicles, terminating by a common aperture in the proventriculus. The subjoined figures from Home's Com- parative Anatomy (vol. ii. pi. Ivi.) show the different forms of the solvent or proventricular glands in different birds. Fig. 160. Eagle. Gannet. Sea-gull. Pigeon. Swan. Goose. Fowl. Turkey. Rhea. Ostrich. The gastric glands are variously arranged. Among the Ruptores, we find them in the Golden Eagle disposed in the form of a broad compact belt; in the Sparrow-Hawk this belt is slightly divided into four distinct portions. In the Insessores the glands are generally arranged in a continuous zone around the pro- ventriculus; but in some of the Syndactyli, as the Hornbill, the circle is composed of the blending together of two large oval groups. Among the Scansnres the Parrots have the gastric glands disposed in a continuous white circle, which is at some distance from the small gizzard. In the Woodpeckers the glands are arranged in a triangular form, with the apex towards the gizzard. In the Toucan they are dispersed over the whole proventriculus, but are more closely aggregated near the gizzard ; the lining membrane of the cavity is reticulate, and the orifices of the glands are in the inter- spaces of the meshes. Among the Rasores the Pigeon shows its affinity to the Passerine Birds in having the gas- tric glands of a simple structure, and arranged. 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 Todd, Robert Bentley, 1809-1860. London, Sherwood, Gilbert, and Piper
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