10 



nasi is single and triangular ; it has a strong spine at the back part. 

 There are three infra-orbital foramina ; and large foramina in the 

 malar bone. The anterior condyloid foramina are two on each side. 



The true vertebra are 23 : 7 cervical, with long simple spines ; 

 12 dorsal ; and 4 lumbar. There are 8 false vertebra, viz. 5 sacral, 

 and 3 coccygeal. The ribs are 12; 7 true, and 5 false. The 

 sternum is composed, below the first portion, of a double series of 

 bones alternating with each other : the same structure obtains in 

 the Pongo. 



The spine of the scapula is strongly incurvated upwards. The 

 bones of the arm and hand are much elongated. The thumb is 

 short; the proximal phalanges of the fingers bent. 



The ilia are narrow, flattened, and elongated. The femur is short 

 and straight ; it has no ligamentum teres, a deficiency which occurs 

 also in the Elephant, the Sloths, in Seals, the Walrus, Qrnithorhyn- 

 chus, &c, and by which a greater extent of motion is allowed to 

 the thigh. The tibia and fibula are shorter than the femur : these, 

 like the bones of the fore- arm, have a greater interosseous space 

 than is found in man. The patella is very tmail. The os calcis pro- 

 jects far behind. The bones of the metatarsus and the phalanges 

 are elongated, the first series of the latter being bent. The hinder 

 thumb is very short : in the individual examined it had a metatar- 

 sal bone, and two phalanges, A nail existed on the thumb of each 

 hinder hand. 



