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Show 1869.] DR. J. MURIE ON THE GULAR POUCH OF OTIS TARDA. 141 approach. The lips of the opening into the gular pouch, then, may be said in strict language to he composed of a fold of the sub-laryngeal membrane stretching between the uro-hyal and the skin of throat. Fore-shortened and reduced view of Bustard's head, to show the gular aperture under the upper larynx. T. Tongue dragged upwards and outwards, a. Aperture of gular pouch. 1. Lip or marginal fold. / Fold of membrane, s.g. Sublingual gland. The glandulse sublinguals (s. g.) are elongated flat bodies of considerable size lying just within each dentary portion of the mandible. Between these, and occupying the middle third, is the skin of the throat, the roots of the feathers being barely hidden, when looking into the mouth, by the thin almost transparent subcutaneous tissue. In the present instance the gular pouch was 4 inches long, and held 2 ounces of water, as it remained in position in the neck of the bird. The thin walls seemed but a continuation or duplicature inwards of the sublaryngeal fibro-mucous tissue or membrane; the same as that constituting its free marginal aperture. As regards the thin muscular strata around the pouch, these, I apprehend, are slightly different from what I found and figured in Otis kori (see P. Z. S. 1868, p. 472). A film of platysma undoubtedly covers the lower part of the sac; a considerable number of small vessels pass beneath and on the surface of the platysma, and as they proceed to the base of the skull run between its internal border and part of the muscle next to be described. What appears |