166 Dr Ktiox on the Structure of the Gibbons. 



marest,) was described by Daubenton from a single specimen, 

 which no longer exists in the French Museum. 



The soft parts of the specimens examined by me were not 

 in a good condition, or at least not so as to admit of very nice 

 examination. I observed that the interosseal ligaments between 

 the bones of the fore-arm and of the leg were not present; the 

 larynx is simple, and without those sacs described by Camper 

 in the Red Orang or Simla Satyrus^ an animal which is now 

 very generally considered merely as the young of the Pongo, 

 and not a distinct species. I did not observe any thyroid gland, 

 though I can scarcely believe it to be altogether wanting. The 

 stomach and intestines had a strong resemblance to the same 

 parts in human structure ; the same remark may be made as 

 to the form of the uterus. The kidneys were much rounded, 

 instead of being oval-shaped as in man. The chief peculiari- 

 ties as to the muscled of the extremities, consisted in the weak- 

 ness and even absence of certain of these powerful muscles, 

 which bend, extend, and rotate the human thumb; but such 

 peculiarities must have been already described by most syste- 

 matic writers on comparative anatomy. 



In the skeleton I observed that the facial angle of the adult 

 was not superior to what we meet with in the ordinary cyno^ 

 cephali or baboons, and this remark, I imagine, will ultimately 

 be found applicable to all the quadrumana : the cristae, with 

 the exception of the supra-orbital, are not apparent ; the cir- 

 cumference of the head, as may be seen by a reference to the 

 table of measurements, is comparatively small. The canine 

 teeth in the upper jaw project very considerably beyond the 

 line of the other teeth. The pelvis extends considerably further 

 than the human does, beyond the level of the coccygeal 

 bones, so that a straight line passing through the pelvis, im- 

 mediately above the symphysis pubis, would not touch any 

 part of the coccygeal bones, unless a very considerable degree 

 of obliquity were given to it. 



The measurements of the skeleton and of the individual 

 bones of the skeleton, compared with the adult male and fe- 

 male human structure, are as follows : — 



