763 



which may be discerned a small 'crista galli ' dividing the cribriform plate : a falculate ridge, 

 not continued from this, projects inwardly from the fore part of the frontal. The bases of 

 the stylohyals have been ossified and anchylosed to the stylohyal fossa. The precondyloid 

 foramen is double on the left side. 



Presented by Prof. Owen, F.E.S. 



5057. The skeleton of a young female Orang-utan (Pithecus Satyrns). 



It has acquired the first permanent molar in both jaws, but retains all the deciduous den- 

 tition. The vertebral formula is: 7 cervical, 12 dorsal, 4 lumbar, and 8 sacro-caudal of 

 which the first three articulate with the iliac bones : the constituents of the ossa innominata 

 are still ununited, and the epiphyses of the long bones have not coalesced with the shafts. 



The animal from which this skeleton was prepared was brought to England by Dr. Abel, 

 who accompanied Lord Amherst, in the Embassy to China, in the year 1817- It was a native 

 of Borneo. It arrived in England in August 1817, and survived its transportation to this 

 country until the 1st of April 1819, during which period it was kept in the Menagerie at 

 Exeter Change. 



Presented by Sir Everard Home, Bart., F.P.R.S. 



5058. The skeleton of a younger Orang-utan (Pithecus Satyrus). 



It shows the deciduous dentition : the first permanent molar is beginning to protrude 

 from its formative alveolus. The vertebral formula is : 7 cervical, 12 dorsal, 4 lumbar, and 

 8 sacro-caudal, the first three of which articulate with the iliac bones. The pleurapophyses, 

 or portions by which the sacral vertebrae effect their articulation with the ossa innominata, 

 still show traces of their primitive distinctness from the centrum. In both this and the pre- 

 ceding skeleton, the body of the sternum shows the same composition of four pairs of ossicles 

 unsymmetrically arranged, and in both, the hallux has but one phalanx, which appears to be 



more common in the female than in the male sex. 



Mus. Brookes. 



5059. The skull of a young Orang-utan (Pithecus Satyrus). 



The deciduous teeth are retained and the first true molars are in place. The maxillo-pre- 

 maxillary sutures are not obliterated. The precondyloid foramina are double on each side. 



The alisphenoids join the parietals. 



Presented by Sir Stamford Raffles, P.Z.S. 



The following, to No. 5079 inclusive, are parts of the same skeleton of the Orang-utan 

 (Pithecus Satyrwi) : 



Purchased. 



5060. The skull. 



It shows an intermediate change in the state of the dentition between Nos. 5056 & 5060. 

 In the upper jaw the lateral incisors, canines and molars of the deciduous series are re- 

 tained, and the large median incisors and first and second true molars are in place. In the 



5E2 



