473 



14. M.glutaus quartus (iliocapsularis), a, . 



ii c, . 



0-39\ 

 0'16J 



0-49 oz. 

 0-27 oz. 



This is the muscle described by human anatomists under the name of 

 ilio capsular is, as sometimes occurring in the human subject ; it belongs 

 to the glutseal group, and not to the iliacal group of muscles, and arises 

 from the surface of the ilium, marked in Pig. 26 (gl. 4) ; and it is in- 

 serted by a flat tendon into the prolongation of the insertion of the glu- 

 teus minimus, with which its action is almost identical. 



15. Jf. 



b, 0-26 oz. 



takes origin from the lateral ridge of the ilium, Fig. 26 {gl. 5), se- 

 parating the glutaeal from the iliacal surface, and is inserted by flat 

 tendon below glut, quartus. 



Fig. 26. 



16. M. piriformis, a, 0*44 oz. 



b > ' * ft °m . 0-18 oz. 



c, . . 0-16J 



This muscle is well developed, and is quite distinct from the gluteus 

 medius ; it has the usual origin, and is inserted partly into the head of 

 the great trochanter, and partly into the fascial origin of the vastus ex- 

 ternus that flows over that trochanter. 



B. — Muscles of the Knee Joint. 



1 . M. tensor vagina femoris, . . a, 



. . b, . . 0-44-1 

 . . c, . . 0-28J 



0-84 oz. 

 0-36 oz. 



This muscle takes its origin from 1^ inch of the anterior superior 

 portion of the lateral ridge of the ilium, below the origin of the sarto- 

 rius, and is lost in the fascia directly covering the rectus femoris halfway 

 down the thigh. I class it, from its connexion with the rectus, among 

 the knee joint, rather the hip joint muscles. 



2. M. rectus femoris, . 



3. M. vastus externus, 



4-42 oz. 



: ?£} ■ • — 



.' 4-30\ 

 . 3-60/ * 



10-14 oz. 



3-95 oz. 



