386 



THE ANATOMY 01< THE HORSE 



;uid two extremities. It was furmerly called the round IjDne, fruiu l)eing in 

 the centre of the part called by butchers " the round." 



The body, although compressed, is nearly cylindrical towards its centre; 

 anteriorly, the bone is convex and smooth ; posteriorly, flattened and 

 rough ; superiorly and inferiorly, it is expanded to meet the enlarged 

 extremities. 



The superior extremity is prolonged into a thi<;k, flattened ueclc, 



Fir. ns.— Tfte Femur, rATtriALLT detached from itii; Cotvloid Cavity. 



A. External view of posterior half of the os in- 

 nominatum. 

 a. Rough surface for the attachment of muscles. 

 6. Cotyloid rim. 

 c. Tuberosity of the ischium. 



1 . Cotyloid ca\-ity. 



2. Dei'ression in which the roimd ligament 



(ligamentuui teres) is lixod. 



3. Obturator liole. 



n. External view of the right femur. 



-I. Head of the femur (round-bone). 

 .'). Trochanter majo" cxtemus. 

 (■>. Tubercle on the head of the femur. 

 7. Trochanter minor cxtemus. 

 S. Fossa for muscul.ir insertion. 

 '.1. 0. Trocldc.ar surfaces for articulation with the 

 patj^lla (knoe-cai>). 



10. External coudylc. 



11. Surfaces articulating with upper extremity of 



the tibia, or leg-bone. 



directed upwaixls and inwards, so as to form an obtuse angle with the 

 .shaft. At the point of union are two eminences (trochanters, rpoxav, to 

 run or roU) ; one on the outer, and the other on the inner side ; and it is 

 from between these that the neck arises. 



The trochanter major is prolonged from the postero-external margin of 

 the body, and nearly in a line with its axis : it is a large irregular projec- 

 tion, rising into a pyramidal eminence. I''osteriorly, at its base, it presents 



