OF THE MUSCLES. 



109 



face of the longissimus dorsi ; from the last two lumbar 

 vertebrce ; from the dorsum of the ilium ; and from the sacro 

 sciatic ligament. Insertion. Into the great trochanter ; and 

 by a slip of muscle into the body of the femur, as low down 

 as the small external trochanter. Action. When the legs are 

 fixed, it aids in raising the anterior of the body ; also, in pro- 

 gressing, it serves to abduct and to retract the femur ; and 

 is actively employed in kicking. 



Biceps rotator tibialis {Plate 11. p. Fig 6 . 5). Ori- 

 gins. Superior head. From the last two sacral spines ; and 

 from the first coccygis. Inferior head. By tendon, which is 

 common also to the posterior head of the triceps abductor 

 tibialis. 



Insertion. Into a roughened tubercle, upon the inner 

 surface of the tibia, by long tendon ; — beneath this tendon 

 will be discovered two bursee. 



Action. To co-operate in rearing and leaping ; also to 

 flex and rotate the tibia. 



FIG 6. 



THE INSIDE OF THE THIGH. 



1 , The vastus internus. 



2, The sartorlus. 



3, The gracilis. 



4, The caput magnum of the triceps 



adductor temoris. 



5, The biceps I'otator tibialis. 



6, The rectus. 



7, Tlie femoral artery. 



Sartorius (Fig 6.2). Origin. Partially bifid supe- 

 riorly ; from the psoas fascia ; from the transverse process 

 of the last lumbar vertebr?e ; and from the brim of the 

 pelvis. Insertion. Into the inner side of the body of the 



