22 STUDIES IN COMPARATIVE ANATOMY. 



We cannot understand PI. 294, fig. 2. The foreshortening is 

 probably wrong. What are described above as the internal 

 fibres of glutceus maximus, Cuvier and Laurillard call hiceps, 

 while the deep inner fibres correspond to their " hiceps — portion 

 femorale." Mayer assigns to glutceus maximus an insertion into 

 the great trochanter; he speaks further of its tendon as blending 

 with a portion of the " caput breve des M. occipitis." 



Glutceus medius arises from the side of the upper part of the 

 sacrum beneath glutceus maximus, from the upper half of the 

 back of the ilium, from the dense fascia covering the muscle, 

 and from the lower and anterior part of the crest of the ilium as 

 far as the anterior spine. It is separated from glutceus minimus 

 by vessels, and the superior gluteal nerve. From this origin the 

 fibres converge and are inserted as follows : — The anterior two- 

 thirds into a line which extends obKquely downwards and for- 

 wards from the superior and posterior part of the great trochanter, 

 the posterior third into the apex of the trochanter and into a 

 Kgament which passes thence to the acetabulum. The most 

 posterior fibres pass down to the posterior root of the trochanter 

 about 8 inches from its apex. 



C. and L.— 276-7 ; 287-8; 294 (a^). 



Glutceus minimus arises from the middle third of the back of 

 the ilium beneath glutceus medius. The fibres converge to a 

 small tendon which is inserted into a depression on the outer 

 aspect of the root of the trochanter. 



C. and L.— 287-8 (a^) ; 294, fig. 1 (a^). The / of the last- 

 mentioned figures, "pyramidal (sacro-trochant^rien)," we have 

 not found as a separate muscle. In the absence of a^ this would 

 agree with our G. minimus. 



Biceps femoris arises by a thin round tendon from the tuber- 

 osity of the ischium beneath and external to the other hamstring 

 muscles. It is narrow above, but widens greatly below. The 

 more anterior fibres are continuous with the lower fibres of 

 glutceus maximus, and are inserted into the outer side of the 

 femur for several inches above the knee. A separable strap-Kke 

 bundle of the most posterior fibres proceeds from the belly of 

 the biceps to the fascia of the leg. The peroneal nerve separ- 

 ates the anterior from the posterior division of the muscle. 



C. and L. (biceps— portion femorale).— 274-5; 276-7; 287-8; 



