725 



I 



Genus Cebus. 



Dental formula :-i g, c |^, P B S= 36 ' 



4670. The skeleton of a Capuchin Monkey (Cebits capucinus). 



The vertebral formula is : 7 cervical, 13 dorsal, 6 lumbar, 3 sacral, and 23 caudal. The 

 transverse process of the atlas is perforated lengthwise by the vertebral artery, which after- 

 wards perforates the neural arch : in the third, fourth and fifth cervicals, the transverse pro- 

 cesses have short but antero-posteriorly extended pleurapophysial ridges : those in the sixth 

 vertebra are developed into broad and long plates projecting downwards and outwards. The 

 simple diapophyses of the seventh cervical are imperforate. The concavo-convex articulations 

 of the bodies of the ninth cervical vertebrae are repeated in this genus. The tubercles repre- 

 senting met- and an-apophyses project distinctly, the one from the fore part, the other 

 from the back part, of the diapophysis of the fifth dorsal : they progressively increase in size 

 and become quite distinct in the thirteenth dorsal, in which the metapophysis has risen upon 

 the anterior zygapophysis. The anapophyses continue to be developed to the penultimate 

 lumbar. The diapophyses progressively increase in length from the first to the last lumbar 

 vertebras. Haemal arches are articulated to the inferior interspaces of the six anterior caudals, 

 and are supported by distinct hypapophyses from the fourth caudal, which processes continue 

 to be developed after the hsemapophyses have ceased to be so. Nine pairs of ribs articulate 

 directly with the sternum, which consists of seven bones and an ensiform cartilage. The 

 humerus is perforated above the inner condyle. The pollex is partially, the hallux wholly, 

 opposed to the other digits of their respective limbs. The fabellae are preserved, one behind 

 each condyle, in both femora. 



Presented by John Gunning, Esq. 



4671. The skeleton of a Capuchin Monkey (Cebus capucinus). 



The vertebral formula is the same in this as in the preceding skeleton, except that the ribs 

 of the thirteenth dorsal have either not been preserved or have not been developed. The 

 diapophyses of the first lumbar appear to have been increased hy an anchylosed rudiment of 

 a rib, which curves slightly backwards. The neural spine of the eleventh dorsal is that 

 towards which the spines of the other trunk-vertebrae converge. Nine pairs of ribs directly 

 articulate with the sternum. The fabellse have been preserved behind the right femur. 

 There are five haemal arches beneath the base of the tail. 



Presented by William Home Cliff, E*q. 



4672. The skeleton of a young Cebw. 



The vertebral formula is : 7 cervical, 14 dorsal, 6 lumbar, 3 sacral, and 25 caudal. The 

 diapophyses of the first lumbar show a surface for the articulation of a rudimental rib, which 

 has become detached. The humerus is perforated both between the condyles and above the 

 inner condyle. 



Purchased. 



