530 Zoological Society. 



the whole of the dorsum Hit unoccupied by the other glutcri except 

 its crista, and is inserted into the anterior part of the trochanter 

 major. The glutceus maximus arises from the prominent ridge on the 

 os ilium below the acetabulum ; it passes on the posterior surface of 

 the thigh-bone; and when it has passed below the head of the tibia 

 it forms a round tendon and passes through a loop situated on the 

 external posterior part of the tibia; continuing its course obliquely 

 downwards, it is inserted into the scabrous ridge on the posterior 

 surface of the tibia near its head. A muscle arises from the trans- 

 verse processes of all the caudal vertebrae except the last, goes for- 

 wards, and is attached to the postero-internal edge of the tibia just 

 below its head. Another muscle arises from the anterior part of the 

 last caudal vertebrce, and is inserted into the external part of the 

 tinea aspera after its bifurcation. The piriformis arises from the an- 

 terior oblique processes of the caudal vertebra, from the tip of the 

 ischium, and from the internal part of the os pubis 5 the fibres con- 

 verge downwards, and are inserted into the intero-anterior ridge of 

 the tibia just below the tubercle. The semitendinosus arises from 

 the ridge immediately anterior to the gluteus maximus, and is inserted 

 immediately inferior to the bifurcation of the linea aspera on its ex- 

 ternal division. The gemini arise from the ischium immediately pos- 

 terior to its spine, and are inserted into the cavity posterior to the 

 trochanter major. A muscle arises from the ischium anterior to the 

 gemini, and is inserted into the intero-anterior ridge of the tibia, just 

 below the piriformis. Of the triceps adductor femoris the first head 

 arises from the extero-inferior part of the pubis ; the second head 

 arises immediately above the first ; and the third above the second, 

 andfrom the interosseous ligament which unites ihepubis andischium: 

 they join on the upper third of the thigh, and are attached to the linea 

 aspera on its internal side and division. The obturator interims arises 

 fleshy from the internal part of the pubis, from part of the obturator 

 foramen, andfrom the ischium-, it forms a tendon which passes through 

 the thyroid foramen, is tied down to the joint, and is inserted into 

 the anterior part of the great trochanter. A muscle arises from the 

 outer edge of the cotyloid cavity, passing outwards and a little 

 upwards, and is inserted behind the trochanter major. Another 

 muscle arises from the anterior part of the acetabulum, passing 

 directly outwards, and is strongly attached to the ligament of the 

 joint ; it is inserted into the thigh-bone just below its neck. 



" A muscle arises from the interior and a small part of the anterior 

 and posterior surfaces of the thigh-bone, from near its neck to the 

 condyles, and forms a tendon which is inserted into the ridge at the 

 anterior internal part of the tibia immediately below its head. The 

 cruralis arises fleshy from all the superior and external parts of the 

 bone not occupied by the former ; one part is inserted into the whole 

 of the superior surface of the patella, the remainder passes over the 

 internal part of the patella and is attached to the internal side of the 

 head of the tibia. A muscle arises by four heads : the first, tendi- 

 nous, from the ridge behind the external condyle which formed the 

 loop through which the glutceus maximus passed ; the second, fleshy, 



