THE NECTURUS 31 



22-23-24. It is split and appears to be the origin of the 

 caudalifemoris. The insertion is at or near the raphe 

 on the puboischio tibialis. 



ISCHIOCAUDALIS 



The innermost of the three tail muscles originates on the 

 hsemapophyses of the tail vertebras, extends anteriorly, 

 and is inserted on the ischium. 



Femorocaudalis 



The third and deepest of the tail muscles is seen by 

 separating the other two. It extends anteriorly and is 

 attached by a tendinous insertion on the femur at about 

 one third of the distance from the head of the bone. These 

 three muscles form the musculature of the tail being 

 specialized out of the mass of muscle in this region. 



MUSCLES OF THE BACK OF THE THIGH 



Separate the muscles so that they are loose from one 

 another and study the relations of this superficial group. 

 Place the animal on its back with the legs at right angles 

 to the body. The anterior muscle is the puboischiofemoralis 

 internus y the second the iUotibialis, the third the ilioex- 

 tensorius, the fourth the iliofibularis and the most posterior 

 the puboischiotibialis. The landmark of the upper or 

 dorsal surface of the thigh is the ilioextensorius. The 

 puboischiofemoralis internus was described as a ventral 

 muscle hence it may be omitted. The final study of this 

 muscle is to be reserved until the pelvis is removed from the 

 body. 



Iliotibialis 



This muscle, second from the anterior border of the 

 thigh, is in front of the ilioextensorius. It originates on 



