OKANG OUTANG. 



41 



gest, and communicated freely with the cavity of 

 the os hyoides, which was separated by membrane 

 from the right sac. This mechanism, as is well re- 

 marked by Camper, appears to be intended to aug- 

 ment the power of the voice. A structure somewhat 

 analogous has been detected in most of the other 

 simise, and some other animals ; but the peculiar 

 structure of the larynx of the Orang escaped the 

 researches of Tyson. 



The epiglottis of our subject is rather broader 

 and shorter than in man ; and the thyroid cartila- 

 ges are something more flat anteriorly. The 

 muscles and ligaments about the larynx and os hy- 

 oides, have much affinity to the correspondingjmrts 

 in the human subject *. 



* In the Simia Maimon, the arytenoid cartilages are much 

 more elevated ; and by their union, form what seems a second 

 epiglottis, which is smaller than the true one, and has its in- 

 side remarkably corrugated or fluted. The true epiglottis is 

 attached to the upper and inner part of the os hyoides, as 

 in man. Under the base of the epiglottis is a very large cavi- 

 ty, projecting forward, and communicating with the upper 

 part of the larynx. It is about half an inch in length. Its 

 extremity is rounded, and lies in the os hyoides, which is 

 hollowed to form it. In the baboon, the os hyoides is also pe- 

 culiar, in having a perpendicular triangular projection, which 

 overlaps the top of the thyroid cartilages. The top of the 

 larynx seems composed of one piece. There is no thyroid gland; 

 and the palate, like that of quadrupeds, is much corrugated. 

 Not being, at the time of this dissection, familiar with the dis- 

 coveries of Camper, the pouch connected with the larnyx 

 was not carefully examined. 



