THE RIBS. 



197 



upwards and a little outwards. It presents, near the middle, a rough eminence 

 for the attachment of part of the second and third digitations of the Serratus 

 Magnus. The inner surface, smooth and concave, is directed downwards and a 

 little inwards : it presents a short groove towards its posterior part. 



Peculiar Ribs. 



Fig. 144 



Fig. 146. 

 Viac/lc wrtir-ulasr /n-cit 



Single nT tic . fact. t 



The tenth rib (Fig. 146) has only a single articular facet on its head. 



The eleventh and twelfth ribs (Figs. 147 and 148) have each a single articular 

 facet on the head, which is of rather large size; they have no neck or tuber - 

 osity, and are pointed at the extremity. The eleventh has a slight angle and 

 a shallow groove on the lower border. The twelfth has neither, and is much 

 shorter than the eleventh. 



