MEMOUl OF CABIPER. 
39 
gnii immediately under the c.hin, and extended to 
the collar and breast bones, and laterally to the 
shoul(le|..i,in,]j.s. When inflated with air, it mea- 
sured seven inches by four. The communicating 
opening in this animal was between the tongue-hone 
uiid the pomum Adami. Lastly, in the orang-outang, 
I earefully raised the superficial parts, occasionally 
inflating the bag with the blowpipe. Here I found 
double bag, and an opening for each side : the bag 
Ui: tended below the upper ])art of the breast-bone, 
and was in fact covered with the pectoral muscles. 
Upwards it extended high above the collar-bones, 
and far back, so as to get beneatli the shoulder- 
idades. It is here worthy of remark, that, in this 
third variety, I at last found the exact anatomy de- 
scribed by Galen in reference to the organs of voice 
Renerally, applying it to man, and never hinting at 
the orang at all." Thus, then, in some species of 
this family, there is no bag, in others two, and some- 
times three, communicating with the os hyoides. 
hen this is the case, ho adds, “ the structure bears 
^ considerable resemblance to the whistle which hun- 
ters use in calling their dogs ; for the air compressed 
i'y the lungs into the cavity of the larynx, is forced 
violently into the bony case, and from thence for- 
"'ard by the opening beneath the epiglottis into the 
'nouth of the animal, and so to a great distance. 
U is thus I would account for the extraordinary noise 
these animals produce, so as to be heard from an im- 
uiense distance, which Markgraaf and other travel- 
