THE MUSCLES OF THE LOWER EXTREMITY. 199 



at least I found this to be tlie case in at least one specimen 

 examined by me. 



The adductors arise from the infero-external margin 

 of the ischium, between the anterior edge of the semi- 

 memhranosus and the obturator foramen. 



The adductor longus (Fig. 64 bis) is the more anterior 

 of the two, and consequently arises the higher on the 

 pelvis, and comes off in front of the adductor magnus, 

 which it largely overlaps. Its fibres pass obliquely to the 

 posterior aspect of the shaft of the femur, down which 

 they become inserted as far as its middle, along the linea 

 aspera, a line which is well marked in our subject. 



The adductor magnus (Fig. 64 his), like the one just 

 described, is also a broad ribbon-like muscle, arising 

 from the ischium between the sonimembranosus and a 

 middle point on the under side of the adductor longus, 

 close up to its semitendinous origin. Anteriorly its 

 margin is free, while posteriorly it is juxtaposed to 

 the anterior border of the semimemhranosus. Passing 

 parallel with those of the other adductor, its fibres are 

 inserted into the distal moiety of the linea aspera of 

 the femoral shaft, down to the intercondyloid notch of 

 that bone, where this muscle makes a very substantial 

 insertion. 



Other authorities at my hand have but little to say 

 about the adductor muscles in the thighs of birds. 



MUSCULATURE OF THE LEG AND THE REMAINING PARTS 

 OF THE LOWER EXTREMITY. 



The preparatory dissection necessary to bring the 

 muscles of these parts into view has already been sug- 

 gested above. 



