142 MR. A. D. BARTLETT ON THE [Feb. 25, 
to represent the so-called stylo-hyoideus is here, as in many other 
birds, divisible into three portions. The posterior is a broad but 
thin layer; this as it diverges from the common cranial origin pro- 
ceeds backwards and downwards, and intermingling along with the 
platysma they both pass round and in front of the gular pouch. 
The middle one, also broad and thin, passes over the upper or deep 
surface of the pouch. The third division, long, narrow, and round- 
ish, runs forwards to the tongue. This triparte but singly named 
muscle may, indeed, be representative of the stylo-hyoid, stylo- 
pharyngeus, and stylo-glossus. Besides these, a broadish band of 
very delicate but transversely striped fibres mingling with the tissue 
of the neck of the pouch itself surrounds it; this I take to be part 
of the superior constrictor of the pharynx, which encircles the in- 
vaginated duplicature of the sublingual or sublaryngeal membrane 
differentiated into gular pouch during later life in the male Bustards. 
The gular pouch, in fact, appears to me but an infolding of the 
membrane below the upper larynx, developed to a large size in male 
Bustards only after they attain ripe or old age. ‘This view, there- 
fore, accounts for its absence in the young, {its moderate size in 
adult, and its increased capaciousness in old birds. 
The present note serves to show:—1. That the gular aperture is 
rather sublaryngeal than sublingual. 2. That in a bird six years 
old it has only reached a very moderate size, compared with what it 
ultimately attains, according to several observers. 3. That there is 
good reason for believing in the so-called sphincter of the pouch, but 
that this is merely a lesser or greater development of the fibres of 
the superior constrictor of the pharynx and stylo-pharyngeus, and not 
a specialized structure alone adapted for the office it here subserves. 
3. Remarks upon the Habits of the Hornbills ( Buceros). 
By A. D. Bartiertr, Superintendent of the Society’s Gardens. 
A few weeks after the Wrinkled Hornbill (Buceros corrugatus) 
was received in the Society's Gardens*, the keeper called my atten- 
tion to a queer-looking fig-like substance he had picked up in the 
aviary. Struck with its appearance, I took it home and endeavoured 
to examine it carefully, and opened its closely folded mouth. I 
found this fig-like bag contained plums or grapes well packed toge- 
ther, the wrapper or envelope looking much like the inner lining of 
a gizzard, somewhat tough, elastic, and gelatinous. Almost alarmed 
for the safety of the bird that had thrown it up, and at the same 
time having some doubt as to its real nature, I at once sought the 
assistance of our Prosector, Dr. Murie, handing him the specimen 
and telling him its history. 
Dr. Murie’s report was as follows :— 
“On examination of the specimen I found, as was at first sug- 
gested in joke, that the bag did absolutely consist of nothing else 
* The specimen was purchased March 27, 1868. 
