1 56 Profeffor camper on the Organs af 
quently return from thence without any force and me- 
lody within the throat and mouth of thefe creatures: 
and this feems to me the molt evident proof of the inca- 
pacity of Orangs, apes,, and monkies, to utter any mo- 
dulated voice, as indeed they never have been obferved 
to do . 
I have already mentioned in the anatomical defcrip- 
tion of the Rein-Deer (p. 5 5. of Mr. allamand’s addition- 
to the XVth volume of the Count de buffon) the fur- 
prizing analogy of its organ of voice with that of the 
Pitted and Cer copithed. That of the Orang feems to have 
fome analogy with that of frogs, w'hofe voice, how- 
ever, can be better modulated by their tongues. I have 
given a defcription of them in the Memoirs of the So- 
ciety of Rotterdam. As I am afraid of having dwelt al- 
ready too long on this fubjedt, I fhalL here finifh this 
eflay ; but promife to fend the Society an account of the 
very extraordinary organ of voice of the alouate or bur-' 
leur de Cayenne , the Simia Capucina of linn^eus, n. 30. 
p. 42. the organ and os hyoides of which, See. I didedted 
fome time ago with. all poflibie care and attention. 
I am, 8cc* 
t m a* 
