756 



breadth from the anterior dorsal to the penultimate lumbar. Eight pairs of ribs directly join 

 the sternum, which consists of four broad and flattened bones : three pairs of ribs, besides 

 the clavicles, articulate with the large manubrium. Both acromion and coracoid are large, 

 and much produced. The clavicles are of unusual length, equalling the extent of the eleven 

 anterior dorsal vertebrae. The bones of the arm and fore-arm are still more remarkable for 

 their length and slenderness, as well as those of the fingers of the hand, the thumb of which 

 is comparatively short and slender. The femur is long and nearly straight. The tibia is 

 slightly bent. The thumb of the hind foot is strong and well-developed, with two phalanges. 

 The great length of the pectoral limbs, and the provision made for the extensive origin of 

 some of their muscles, by the Breadth of the thorax and the size of the scapulae and clavicles, 

 relate to the chief share which these limbs take in the rapid and characteristic locomotion of 

 this species, which swings itself thereby from branch to branch, with a force that propels the 

 body through considerable distances. 



Presented by Dr. Henderson. 



5027. The skeleton of the Gibbon which has been especially called the ' Long- 

 armed Ape ' (Hylobates Lar). 



The vertebral formula is: 7 cervical, 13 dorsal, 5 lumbar, 5 sacral, and 2 caudal. The 

 characters of these vertebrae resemble those in the preceding species, except that a rudiment 

 of the anapophysis may be observed in the first and second lumbars. Seven pairs of ribs 

 directly join the sternum, which is here reduced, by anchylosis, to two bones, the manu- 

 brium and the so-called body. Only the first pair of ribs and half of the second pair join the 

 manubrium. The characters of the bones of the extremities repeat those of the preceding 

 specimen, in neither of which is the humerus perforated at its distal end. 



Mus. Brookes. 



5028. The bones of the trunk and extremities of an immature male specimen of 

 the Greater Gibbon (Hylobates variegatus). 



The vertebral formula is: 7 cervical, 13 dorsal, 5 lumbar, and 7 sacro-caudal. Seven 

 pairs of ribs directly join the sternum, which consists of the manubrium, the body, and a 

 slender bony base of the ' ensiform cartilage.' Two pairs of ribs, and part of a third pair, 

 articulate with the manubrium. The diapophysis, metapophysis and anapophysis are distinct 

 in the first lumbar. 



From the forests of Deval, Bengal. 



Presented by Dr. Henderson. 



5029. The bones of the trunk and the scapular arch of a Gibbon (Hylobates). 



The number of ' true vertebrae ' is the same as in the preceding skeletons of the Gibbons, 

 but in this specimen there are fourteen pairs of ribs, a short and straight pair being developed 

 from the vertebra answering to the first lumbar in the preceding specimens. The anapophysis, 

 which begins to be developed and projects backwards from the last dorsal, increases in length 

 and distinctness in the two succeeding vertebrae, diminishes suddenly in the third, and disap- 



