214 ME. F. E. BEDDAED— CONTEIBUTIONS TO THE 



origin extends right round from the anterior part of the symphysis pubis to the ischial 

 tuberosity ; it divides near its insertion into two bands of muscle, of which the anterior 

 is the wider ; this (the anterior) is inserted along a line measuring an inch and a 

 quarter, and lying between the insertion of the adductor longus and the origin of the 

 femoral head of the bice])s ; the second part is inserted close to the end of the femur. 



(20) Tibialis anticus. — This muscle arises from the head of the tibia, and from its 

 shaft down to about the middle ; it also arises from the septum between itself and the 

 extensor communis and from the fascia covering the leg. It is inserted by a stout tendon 

 measuring one inch and a half in length to the radial tarsal. 



(21) Extensor proiirius hallucis is a slender delicate muscle arising from the fibula 

 and from the interosseous membrane ; the area of origin of the muscle is an inch and 

 a half or so in length ; the tendon in which the muscle ends is slender ; its expanded 

 flattened extremity is inserted on to the base of. the phalanx of the hallux. 



(22) Extensor longus digitormn pedis.— This muscle arises from the tibia and for 

 rather more than half of the fibula, from the interosseous membrane, and from the 

 septa between itself and the tibialis anticus and peronceus ; at the ankle-joint the muscle 

 gives rise to three tendons, which are inserted on to the last phalanx of each of the 

 last three toes. 



(23) Extensor brevis digitorum is represented by the fleshy mass covering the foot; 

 this is really separable into three muscular slips, which supply digits ii.-iv. ; the muscle 

 supplying digit iii. is partly inserted on to the tendon of the long extensor ; the two 

 extensors supplying digit iv. do not join until long after they have both become 

 tendinous. 



(24) Peronceus longus. — The muscle arises from the head of the fibula and from its 

 shaft down to about the middle, from the septum between itself and the flexor on one 

 side and the extensor longus digitorum on the other ; the tendon crosses the foot 

 between the tarsal bones and the metatarsals, and deep of the intrinsic muscles of the 

 foot : it is inserted on to the metatarsal of the hallux. 



(25) Peronceus brevis. — This muscle arises from the lower part of the shaft of the 

 fibula and from the septum between itself and the peronceus longus and from the fascia 

 coverino' the leg ; its tendon is inserted on to the outside of the last metacarpal. 



These are the only two peroneal muscles. 



(26) Gastrocnemius. — The gastrocnemius arises by three distinct heads. The outer 

 head arises in common with the flexor from the outer head of the femur ; it becomes 

 separate from the flexor two and a quarter inches from their common origin. The 

 inner head arises from the femur just behind the internal condyle, and just below, and 

 in front of, the insertion of the hinder part of the adductor magnus. The third head, 

 which corresponds to the soleus of other animals, including Man, arises by a stout 

 tendon on the under surface of the head of the fibula. The three heads join rather 

 further than halfway down the leg. The common tendon is inserted on to the os 



