1865.] MYOLOGY OF HYRAX CAPENSIS. 347 
head arising from the tuberosity of the ischium, behind the last- 
described muscle ; the other, larger and broader, has an origin from 
the caudal vertebre fully an inch broad. These two flat heads 
unite to form a single roundish muscle, which is inserted by a thin 
tendon into the upper third of the front of the tibia, below the 
insertions of the gracilis and semimembranosus (fig. 11, S. ¢.). 
The semimembranosus, as Meckel* remarks, has an extraordinary 
breadth and thickness. It has, like the last, a double origin, one 
head arising from the ischium behind the semitendinosus, the other 
head arising from all the caudal vertebre posterior to the origin of 
the last named, and closely connected with the levator ani. These 
two flat muscular heads unite, like those of the semitendinosus, to 
form a large and powerful muscle, which is inserted into the inner 
condyle of femur and upper part of tibia (fig. 11, S. m.). 
Ries 11: 
Buttocks and lower limb, to below the knee. 
I. Iliacus. G. maz. Insertion of gluteus maximus. G. med. Gluteus medius. 
T.v. f. Tensor vagine femoris. C. Coccygeus. 0.2. Obturator internus. 
G.s. Gemellus superior. G.i. Gemellus inferior. Q./f. Quadratus femoris. 
Ad. mag. Adductor magnus. V.e. Vastus externus. JB. The insertions of 
the biceps, turned back. S.¢. Semitendinosus. S.m. Semimembranosus. 
G. Gastrocnemius. P./. Peroneus longus. £./.d. Extensor longus digito- 
rum. T.a. Tibialis anticus. 
The sartorius was not represented, even in the most rudimentary 
manner ; and, as above said, the muscle described by Meckel+ under 
this name is really the tensor vaginze femoris. 
* Loc. cit. p. 386. t Loe. cit. p. 399. 
