Speech of the Orang Outang. 143 
men, could not be applied to this very particular defini- 
/ 
tion of no fmall bags, ventriculum non parvum. 
In November 1758 I differed another monkey, in 
which the membranous bag, d, n, 0, was much larger, 
fo as to occupy almoft the whole fore part of the neck, 
under the latijjlmi colli. 
In the dlpella (the 29th fpecies of linn^ius, Syft. Nat. 
ed. xn. p. 42. or fimia caudata imberbis y cauda fubpre- 
benfdi , torpor e fufco , pedibus nigris ) was no fuch a bag at 
all, nor any opening at the root of the epiglottis , which 
was entirely fimilar to that of dogs. I cannot forbear to 
mention, that in this monkey the meatus , or the procejfus. 
peritonai , were clofed as in men. This I difiedted in the 
year 1768, when I was Profeflor in the Univeriity of 
Groningen. 
Here I got the opportunity, the year following, of 
diflediing two papiones or fphinges of linn^eus, Jimice 
fetni caudata ore vibrijfato unguibus acuminatis , fpec. 6. 
p. 35. a male and a female; in which the epiglottis was 
likewife perforated, the os hyoides as in the former, but 
the pouch very fmall in comparifon of the apes, who 
were very large.. 
As thefe parts are fo apparent in a great many mon- 
kies, and likewife in the ape or Pithecos , I was very much- 
furprized eustachius did not difcover them, efpecially 
