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COUES, 



Piriformis. — A thin flat triangular muscle that arises by three digi- 

 tations from the fascia over the caudal vertebra?, and so, in effect, 

 from the coccygeal spines themselves; it is wholly overlaid by the 

 great glutseus ; it lies, itself, upon lateral caudal muscles, proceeding 

 directly transverse, narrowing as it goes, to be inserted by a thin 

 narrow definite tendon into middle of femur behind, at foot of ecto- 

 trochanteric ridge, opposite the termination of the glutceas minimus. 

 It abducts, and slightly rotates inward. 



Quadratus femoris. — Below and behind the preceding, smaller, and 

 ribbon-like. It arises from the two most prominent transverse proc- 

 esses of coccygeal vertebrae, in the septum betwixt the dorso-lateral 

 and ischio-coccygeal caudal muscles, and proceeds outward and for- 

 ward just behind the ectotrochanter, to be inserted into the middle of 

 the back of the femur, opposite the insertion of the foregoing. It 

 chiefly retroducts the thigh with slight abduction and inversion. 



(b. ; — From pelvic arch ; " short.") 



lliacus. — With the usual position and relations ; above of small 

 size, owing to the dimensions and contour of the ilium ; but below, 

 after fusion with theps. magnus, remarkable for its great fleshy mass, 

 that fills the interval between the ilium and pectineal eminence, and 

 its unusually extensive and fleshy insertion into the entotrochanter. 

 After passing the hip-joint, which it directly overlies, it lies along the 

 inner aspect of the femur, overlaid by the pectinseus, separated from 

 the glutaei by interposition of rectus femoris. The insertion contin- 

 ues along the entotrochanter and thence down the bone nearly to the 

 inner condyle. The usual actions of flexion and eversion are here 

 very strongly displayed. 



Glutcei (medius et minimus). — Though somewhat blended, still 

 mostly separable, with due care, into an anterior (minimus) moiety, 

 that is partly overlapped by a posterior and more superficial division 

 {medius) ; both are completely separated from ectoglutceus. They arise 

 together from the whole surface of the narrow ilium, from apex to 

 acetabulum ; and they are inserted, fleshy, a, mesoglutceus, chiefly, if 

 not wholly, into the apex of ectotrochanter, and, b, entoglutmis, into 

 the same trochanter and into the ridge descending thence for one-half 

 inch clown the shaft. These muscles are flexors from their origin and 

 line of traction, while they also invert, from their insertion. 



Adductor magnus. — The muscle which we thus homologize from its 

 posterior position and extensive femoral insertion is smaller than 

 either of the other adductors proper, although surpassing in size the 

 pectinseus. It arises from the ischio-pubic ramus just in advance of the 

 origin of the semi-tendinosus, by a rather long, thin, flat tendon; 

 forms a thin, narrow triangle, passing outward to the thigh to be in- 

 serted in a line along the postero-internal aspect of the femur from 



