OCR Text |
Show 1882.] DR. GADOW ON THE ANATOMY OF PTEROCLES. 323 out at the upper and lower end of the crop. The glands are nearly equally distributed over the inner lining of its walls, and are arranged in very irregular longitudinal folds. The proventriculus of Pterocles is a long oval, and comparatively small; its walls are thick and full of glands, which are " ovoidal anil simple as in the Pigeon and Plover, not botryoidal as in the Grouse and Fowls." The ventriculus or gizzard is of a subquadrangular shape, much flattened and very muscular, showing on the right and on the left side a speculum tendinosum ; the posterior wall is deeply bent in Fig. 3. Bight lateral view of iutestines of Pterocles arenarius. re, right caecum; I, II, III, IV, intestinal loops. towards the middle line. Its inner lining consists of a hardened and much thickened excreted mass, without however forming any distinct triturating planes. The duodenum, ileum, and rectum form four distinct " closed " loops, which are arranged as follows :-The first, or duodenal loop is very short and straight, as it only extends over the posterior margin of the gizzard; its diameter is slightly larger than that of the ileum ; the length of the duodenal loop in Pterocles is about 4*5 |