1869.] DR. J. MURIE ON THE GULAR POUCH OF OTIS TARDA. 14] 
approach. The lips of the opening into the gular pouch, then, may 
be said in strict language to be 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. /. Lip 
or marginal fold. f Fold of membrane. s.g. Sublingual gland. 
The glandule sublinguales (s. g.) are elongated flat bodies of 
considerable size lying just within each dentary portion of the man- 
dible. Between these, and occupying the middle third, is the skin of 
the throat, the roots of the feathers being barely hidden, when look- 
ing into the mouth, by the thin almost transparent subcutaneous 
tissue. 
n 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 undoubt- 
edly 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 
