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logy of this muscle does not appear at first sight very distinct ; but it 

 seems to agree with the muscle described by Harrison as the ilio-capsular, 

 •which rarely though occasionally occurs in man ; and Dr. Wilson has 

 suggested to me that it may be the homotype in the hinder limb of the 

 supraspinatus in the upper extremity. 



The glutseal artery, nerve, and vein, separate it from the gluteus 

 minimus, and pass directly backwards to supply the muscles of the hip. 



Iliacus is a triangular muscle, arising from the part of the iliac bone 

 directly under the glutaeus medius, and between the glutaeus minimus 

 and opponens muscles ; it passes downwards and outwards to be inserted 

 into the lower part of the neck of the femur and lesser trochanter, un- 

 der the cruraeus. The sciatic artery passes along with the sciatic nerve 

 downwards to form the poplitaeal, as the femoral artery is small, and only 

 supplies the front of the thigh. The femoral vein and artery are separated 

 by the crural nerve. Cruraeus — a large oval muscle — arises tendinous 

 and fleshy from the point of the great trochanter, and from the lower 

 two-thirds of the anterior surface of the shaft of the femur ; the fibres 

 run forwards, and are inserted fleshy into the upper border of the patella 

 on the inner side, and by a tendinous expansion into the anterior edge 

 of the head of the tibia. Vastus internus muscle is composed of two 

 parts, a superficial and a deeper seated ; the former arises from the pos- 

 terior and internal side of the femur, and from the linea asp era as far as 

 to within two inches of the condyle ; the second portion arises from the 

 anterior and inner side of the bone ; and is distinct from the former part, 

 which overlaps it ; the fibres of both muscles unite below to form a 

 twisted tendon, which is inserted into the inner side of the head of the 

 tibia, into the inner edge of the patella and the ligamentum patellae. 



Vastus externus is likewise divisible into two planes of fibres : the 

 superficial, strong, oval, fleshy and tendinous, arises from the outer sur- 

 face of the great trochanter, and from the upper part of the external 

 division of the linea aspera and the rough surface at the upper and outer 

 part of the femur for two inches and a half from the point of the tro- 

 chanter ; the fibres pass downwards and forwards to form a flat tendon 

 which is inserted into the capsule of the knee, into the upper border of 

 the patella, and by a tendinous expansion into the external side of the 

 tubercle of the tibia ; this tendon is connected to the origin of the gas- 

 trocnemius, and overlaps the tendons of the glutaeus medius and minimus. 

 The deeper plane of fibres arise from the ridge on the external surface 

 of the femur, and forms a fan- shaped tendon, which is best developed 

 along the posterior edge ; a flat tendinous band passes from its deep 

 surface to the outer edge of the tubercle of the tibia, running downwards, 

 backwards, and outwards, along with the external lateral ligament, and 

 connected to the outer origins of the flexor muscles ; the rest of it is 

 inserted, with the superficial part of the vastus, into the patella and 

 tubercle of the tibia. 



Rectus femoris arises fleshy from the anterior spine on the iliac bone, 

 three inches in front of the acetabulum ; it forms a strong oval belly, 

 which ends in a flat tendon, which soon becomes rounded, and passes 



