Speech of the OrangOutang. » 141 
without differing monkies, to compare his exatft defcrip- 
tions with. I got for that purpofe, in the year 1 754, a 
Cynocephalus, and was charmed to find the exadtnefs of 
almoft all galen’s defcriptions. The organ of fpeech 
puzzled me, neverthelefs, very much, and I was not able 
to explain his obfervations, fo as to fatisfy myfelf in this 
animal; I was obliged, therefore, for want of other 
apes, to delay my refearches to another opportunity, 
which, however, I did not meet with till I came to Am- 
fterdam, where 1 fettled in the year 175 5 . 
I difcovered, at the beginning of 1757, in another' 
Cynocephalus, that the balls of the os byoides was very 
large and hollow ; and that a membranous bag, lying 
under the latiffimi colli (which touch one another in the 
middle of the neck in thefe animals) went up into this 
bony cavity, having a communication with the infide of 
the larynx by a hole at the root of the epiglottis 
The ftruAure of thefe and the Orang wilLbe better 
underftood by the four figures engraved after my own: 
drawings for the anatomy of the Orang. I intend to 
publifh them with that of the Rhinoceros with the dour- 
ble horn, and the Rein-Deer. 
In the Cynocephalus I found the whole organ of voice 
pretty much like that of dogs, except the pouch d , n, 0, i, 
fig. 4. Examining the root of the epiglottis I found , a 
hole- 
