40 



THE BOXES AND JOINTS. 



Right shoulder-girdle of Runn csnikntu, from 

 above. 



ca Cav. articularis. 

 c. c Cartilage. 

 cl Clavicle. 



co Coracoid. 

 sc Scapula. 

 sc' Suprascapula. 



dorsal and ventral portions ; 

 the inner extremity rests upon 

 the epicoracoid. The clavicle is 

 grooved on its superior and 

 posterior surfaces in almost its 

 whole length; the groove widens 

 externally (I), and contains 



c. The precoracoid (Fig. 

 34 cl"), a slender bar of cartilage, 

 connecting- the anterior edge of 

 the scapula with the sternum. 



Cartilages of the shoulder-girdle (Figs. 2,4, 32, 34). A car- 

 tilage (c), described by Duges as the 'paraglenal/ connects the 

 scapula with the coracoid,, and converts the notch between the two 

 processes (s and v) on the inner border of the scapula into an 

 aperture opening posteriorly into the glenoid cavity, and which is 

 filled up by the lining cartilage. This cartilage connects the two 

 processes with the coracoid; being thicker between this and the 

 proc. coracoideus, it takes an important share in the formation of 



34- 



Hinder border of the sca- 

 pula and coracoid, with 

 the connecting cartilage 

 and shoulder-joint, i \vicc 

 nat. size. 



c Connecting cartilage. 



d Dorsal process. 



eo Coracoid. 



sc Scapula. 



v Ventral process. 



Clavicular cartilage of a young specimen of liana tvrulciitti. 

 enlarged to the adult size. 



Connecting cartilage. 

 Epieoracoids. 



Ligament between the two cartilages. 

 ( 'lavicle. 



C Clavicle and precoracoid. 

 it Coracoid. 

 >' Cartilage of same. 

 i : x Omosternum. 

 Its Sternum proper. 



the floor of the glenoid cavity. At the outer extremity of the 

 clavicle the cartilage projects and is then continued in the groove 



