100 



THE CAT. 



[chap. IV. 



the phalanx is very much compressed laterally, ending distaUy in a 

 sharp, vertically-curved process (a) like the upper beak of a bird of 

 prey, and greatly flattened from side to side. A thin lamella of 

 bone projects forwards (b) above and on each side of the base of this 

 beak, enclosing a deep groove for the reception of the claw. 



Two small round extra bones, called sesamoid bones (s), are (as 

 before said) placed beneath the junction of the proximal phalanx 

 and metacarpal of each of the digits. 



Fig. 61.— CojofExiONS OF Right Humeetjs and Scapula. 



A. Seen within. 



B. Seen from above. 



a. Acromion process. 



ah. Fibres from acromion to capsule. 



b. Tendon of biceps. 



c. Coracoid process, 

 cc. Capsular ligaments 



en. Corftco-clavicular ligament. 



ct. Claviele. 



dh and ch. Fibres from coracoid to capsule or 



coraco-humeral ligament. 

 is. Infra-spinatiis, cut sliort. 

 Id. Latissimus dorsi, cut short. 

 s. Sub-scapularis, cut'sliort. 

 sp. Sujyra-spiiiattis, cut short. 

 t. Transverse fibres. 



§ 9. The pectoral limb, as a whole, is connected with the 

 dorsal part of the axial skeleton neither by cartilage nor ligament, 

 but by muscular connexion only. It is, however, connected with 

 the ventral part of that skeleton, namely, with the sternum and with 

 the first rib, by ligamentous union. Such a union exists between 

 the sternum and the rudimentary clavicle on the one part, and 

 between the clavicle and the scapula on the other part ; for the 

 clavicle is connected with the coracoid process by a ligament called 

 coraco-cladcular (Fig. 61, cc). 



The shoulder-joint is a remarkably free one, allo-\ving the fore-leg 

 to be rotated to a considerable extent in all dii'ections. The cartila- 

 ginous cup of the glenoid is deepened by a circular ligament (the 

 glenoid ligament) which surrounds its margin. 



The joint is surrounded by a capsular ligament (ca), which 

 extends down from the glenoid ligament round the head of the 



