755 



5021. The skull of a young Diana-Monkey (Cercopithecus Diana). 



The first true molars are in place, and the upper anterior canines are coming through the 

 bones : the rest of the dentition belongs to the deciduous series. 



Purchased. 



5022. The cranium, with the deciduous dentition, of a young White-throated Monkey 

 ( Cercopith ecus albogularis) . 



The first true molars have not cut the gum. The elements of the occipital have coalesced, 

 and likewise those which form the complex ' temporal bone ' of Anthropotomy. The mastoid 

 process is styliform. The upper deciduous canines are implanted by two connate fangs. 



Hunterian. 



5023. The skull of a young Patas Monkey (Cercopithecus ruder). 



The deciduous teeth are retained and the first true molars of the permanent series have 

 been acquired : the germs of other teeth of the permanent series are exposed on the right 

 side of both jaws. The calvarium is detached. 



Purchased. 



Purchased. 



5024. The skull of a young female Patas Monkey (Cercopithecus rubef). 



The postglenoid processes are pointed or stylifonn. 



5025. The cranium of a young Cercopithecus. 



The entocarotids have been injected to demonstrate the carotid foramina which pierce the 

 petrosals. 



Purchased. 



(With a broad sternum.) 



Genus Hylobates. 



5026. The skeleton of a Silvery Gibbon (Hylobates leuciscus). 



The vertebral formula is : " cervical, 13 dorsal, 5 lumbar, 5 sacral, and 2 caudal. The 

 transverse process of the atlas is perforated lengthwise, the neural arch is grooved, by the 

 vertebral artery. A pleurapophysial part of the transverse process begins to project forwards 

 on the fifth cervical, and becomes a distinct and larger depressed plate on the sixth : the 

 transverse process of the seventh is a simple diapophysis, and is imperforate. The metapo- 

 physis and anapophysis become distinct in the twelfth dorsal, and diverge from each other 

 with increase of size in the thirteenth. The anapophysis disappears in the lumbar vertebrae, 

 whilst the diapophysis reappears and the metapophysis is retained. 



The spinous processes slightly, but progressively, increase in length and antero-posterior 



