76 OSTEOLOGY, OR ANATOMY OF OSSEOUS SYSTEM 



vexity upward. On the upper surface, close in front of the 

 tuberosity, is a rough impression for the scalenus medius 

 muscle, and in front of that two smooth depressions with an 

 intervening ridge; the posterior depression is for the "third 

 portion" of the subclavian artery, the ridge ending in the 

 scalene tubercle (Lisfranc's tubercle) is for the attachment 

 of the scalenus anticus muscle, and the anterior depression 

 for the subclavian vein. This surface about its middle also 

 gives attachment to a part of the serratus magnus. The under 

 surface is smooth. There is no subcostal groove. 



FIG. 14 



TUBERCLE 



NECK 



GROOVE 

 FOR SUBCLA- 

 VIAN ARTERV 



-HEAD 



'HEAD 



SCALENE: 

 TUBERCLE 



GROOVE FOR 

 SUBCLAVIAN VEIN 



The first and second ribs of the right side, viewed from above. (Testut.) 



The second rib is not twisted and has no angle (Henle) ; 

 it presents near its middle, impressions for the scalenus posticus 

 and two serrations of the serratus magnus muscles. Its head 

 presents a double articular facet. 



The tenth rib may have but one articular facet. 



The eleventh and twelfth ribs are short, have single articular 

 facets, and only slight elevations to mark the tuberosities 

 which do not articulate with the transverse process. They 

 are pointed at their anterior extremities. 



The eleventh has a slight subcostal groove; the twelfth has 

 no angle. 



