744 



The following, to No. 4917 inclusive, are parts of the same skeleton of the Black Monkey 



(Macacus niger) : 



Presented by the Zoological Society of London. 



4855. The skull. 



The last true molars (m 3) are still concealed. The premaxillaries join the nasals. 



4856. The atlas. 



The neural arch and transverse process are both perforated by the vertebral artery. The 

 neural arch is likewise perforated at right angles to the arterial foramen and groove. 







4857. The axis. 



* 



4858. The third, fourth, fifth and sixth cervical vertebrae. 



The pleurapophysis increases from the first of these until it becomes a flat plate in the 

 sixth cervical with its outer extremities produced in opposite directions. 



4859. The seventh cervical vertebra. 



The transverse process consists of the diapophysis only. 



4860. The thirteen dorsal vertebrae. 



4861. The seven lumbar vertebrae. 



The diapophysis increases in size from the first to the fifth, but diminishes in the two fol- 

 lowing. The metapophyses and anapophyses gradually diminish in size and distinctness to 

 the sixth, and the anapophysis disappears in the last lumbar. 



4862. The sacrum. 



It consists of two anchylosed vertebrae . The metapophyses are still persistent, although 

 small. 



4863. The three bones of which the coccyx or tail consists. 



4864. The thirteen pairs of thoracic ribs. 



4865. The sternum. 



It consists of a manubrium and five other bones. 



