102 THE MUSCLES. 



covering- the hinder part of the m. glittaeus, and is inserted into the 

 outer surface of the middle third of the femur. 



125. M. qnadratusfemoris (Fig. 84 qf). 



Duges, post-ilio-f^moral (Homologueof the glulai-ns utaximus], n. 197. 

 Zenker, glutaeus minor, p. 42. 



This muscle is of a somewhat elongated, triangular shape, and 

 arises, under cover of the pyriformis, from the ilium behind the ace- 

 tabulum ; it passes backwards over the joint to be inserted into the 

 inner and under surfaces of the fenmr, between the pyriformis and 

 ilio-psoas ; below, it is in direct relation with the adductor brevis. 



126. M. obturatoriw (Figs. 84, 85 og). 



Duges, ischio-pubi-f&noral, n. 139 (?). Zenker, tn. capsularisfemoris. 



This small muscle is deeply situated upon the hip-joint, and 

 covered by all the other muscles that arise from the symphysis. Its 

 origin from the innominate bone extends from the superior posterior 

 angle of the symph. ossis ilii to about the middle of the pubic sym- 

 physis ; the muscle fills the space between the crest of the sym- 

 physis and the acetabulum. The fibres converge to pass into a 

 strong tendon, which is inserted into the posterior and anterior 

 surfaces of the head of the femur. The muscle appears to represent 

 collectively the small rotators of human anatomy, m. obturator ex- 

 tern us and intermix and the ye nielli. 



II. MUSCLES OF THE LEG. 

 General description. 



On the outer surface (the anterior of man), covered by the fascia 

 cruris, into which the tendon of the extensor communis cruris or 

 triceps is prolonged, are found the following muscles : nearest to the 

 tfphe, the m. extensor cntris brevis (ec]; externally, the in. tibialis 

 antic M (to) and the m. peroneus (pe). On the inner surface (the 

 hinder of man) lie the gastrocneniius (gc^ and tioialis posticiis (tp), and 

 deeply the flexor tarsi sup. (ft). 



127. M. yastrocueiitius (Figs. 80, 81, 86). 



Duges, bi-f^moro-plantaire, n. 159. 



This important muscle arises by two tendinous heads. The one 

 (Fig. 86 /) rather nearer the middle line of the popliteal space, is 

 by far the stronger : it arises by a broad, tendinous expansion, 

 which covers the knee-joint, and is attached to the femur and the 

 tibio-fibula by anterior and posterior bands respectively ; it ends 



