758 . 



5033. The last dorsal, four lumbar and five sacral vertebrae. 



The last dorsal shows well the separate diapophyses, metapophyses, anapophyses, and 

 zygapophyses, more particularly the distinction between the anterior zygapophysis and the 

 now superadded metapophysis. The diapophyses are broad, depressed plates, progressively 

 increasing in the first three lumbar, whilst the anapophyses diminish and disappear on the 

 third lumbar. The metapophysis recedes from the anterior zygapophysis in the last lumbar, 

 and becomes quite distinct from it in the first sacral, in which, nevertheless, the articular sur- 

 face of the zygapophysis has a nearly vertical position. 



The sacrum, by its greater breadth and the number of vertebrae forming it, indicates the 

 nearer affinity of the Siamang to the Orang. 



5034. The left clavicle. 



It is subcompressed, curved, and equals the scapula in length. 



5035. The left scapula. 



The supraspinal nearly equals the infraspinal fossa in depth : both acromion and coracoid 

 are remarkable for their length. 



5036. The right humerus. 



This bone is eleven inches in length, is straight, with a very deep bicipital groove, and is 

 imperf orate at its distal end. 



5037. The right radius. 



From the surface which articulates with the humerus, to the apex of its styloid process, 

 this bone measures twelve inches. 



5038. The right ulna. 



From the summit of the olecranon to the apex of its styloid process, this bone measures 

 twelve inches and a half. 



5039. The bones of the left hand, naturally articulated, with the nails. 



The carpus shows a dismemberment of the scaphoid, wedged between the main part of that 

 bone and the trapezoides : there is also an accessory ossicle between the scaphoid and trape- 

 zium. The pollex extends a little way beyond the proximal end of the first phalanx of the 

 index ; and the first and second phalanges of the fingers are curved, and slightly expanded at 

 their middle part. 



5040. The ossa innominata. 



