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Show 284 PROF. ST.-GEORGE MIVART ON THE [Feb. 21, insertion of the gracilis), and dips in beneath the internal lateral of the lesser joint. The second part arises from the caudal vertebra?, beneath and closely connected with the hinder half of the origin of the first part of the biceps; it is inserted behind and above the inner condyle of the femur by a small, but strong, round tendon. The semitendinosus has only a single origin (but a very extensive one) from the fascia investing the ilium, sacrum, and anterior caudal vertebra?; it is inserted into the groove on the outer side of the strong (deltoid-ridge-like) prominence on the front of the tibia, and by fascia into the tibia below and above that prominence. The upper part of its insertion is enveloped by that of the gracilis. The sartorius arises from the anterior inferior spine of the ilium, and ends distally in the fascia investing the patella1. The gracilis consists of two distinct parts. The upper of these arises from the ilio-pectineal ridge and pubic symphysis ; it is inserted into the inner side of the patella and head of the tibia, its aponeurosis of insertion being continuous with that of the second or lower part of the gracilis. This second part (which is very large) arises from the pubic symphysis and the adjacent ramus of the ischium; it is inserted into the front of the tibia from the patella to below the summit of the insertion of the semitendinosus. The adductor is made up of four more or less distinct muscles:- (1) Arises, beneath the gracilis, from the brim of the pelvis (ventrad of the origin of the pectineus) and from the front end of the pubic symphysis ; it is inserted into the middle third of the back of the femur between the insertion of the pectineus and that of the second part of the adductor, its insertion descending below the insertion of the former, but not so low as that of the latter. (2) The second part of the adductor (adductor magnus) arises from the symphysis pubis and the adjacent ramus of the ischium, covered in by the gracilis; it is inserted into the lower half of the middle of the posterior surface of the femur. There is no Hunter's canal, the great femoral artery passing along the inner side of the lower end of the muscle. (3) This part (adductor primus) arises from the brim of the pelvis, dorsad of the origin of the first part of the adductor ; it is inserted into the back of the femur, on the inner side of the first part of the adductor and closely connected with it, although not extendi) g so far downwards, though it is conterminous above with that first portion. (4) The fourth part of the adductor arises from the pubic symphysis beneath the adjacent parts of the origins of the first and second portions of the adductor. It passes down beside the hinder margin of the pectineus, and is inserted into the outside of the great trochanter. The great sciatic nerve passes down outside its insertion. 1 This is the muscle which was described as the tensor vagince femoris in the Agouti (P. Z. S. 1866, p. 405); while what is there (p. 409) described as the sartorius, is really, 1 believe, the upper portion of the gracilis. |
