22 MESSRS. r. E. BEDDARD AND F. TREVES ON THE [Jail. 15, 



(3) Arises from the shaft of the fibula behind and below the 

 other peroneal muscles ; it passes down beneath the tendon of second 

 peroneal and is inserted on to the cuboid bone. 



(4) The fdurth peroneal is a small muscle arising from the lower 

 part of the first peroneal ; it is inserted into the tendon of the third 

 peroneal. 



Extensor communis diffitorutn. — This muscle arises from the upper 

 part of the tibia ; it is a fleshy muscle and passes down through a 

 well-marked annular ligament ; its tendon divides into three branches; 

 two very strong ones supply inner and outer toes ; the tendon of 

 middle toe is very slender. 



The anterior tibial arises by two muscular bands from the shaft 

 of the tibia ; it is inserted below into the base of the inner meta- 

 tarsal bone and tarsus. 



Extensor brevis digitorum, arises from astragalus, and is inserted 

 mainly into the middle toe together with the longus, but forming 

 much the larger part of the tendon ; some fibres go to the inner toe, 

 none to the outer. 



Flexor communis diffitorum.—T\us is a large fleshy muscle and 

 tiikes the place of the fiexores longus, longus pollicis, and of the 

 tibialis posticus in Man. It arises from the posterior surface of the 

 tibia and of the fibula; the origin from the fibula extends as high 

 up as a ridge on its head ; it also arises from fascia over popliteal ; 

 from the tibia it arises only from the outer side of the lower part of 

 the shaft ; the muscle becomes tendinous at the ankle and passes 

 over a trochlear surface formed partly of cartilage and in connection, 

 as it appeared, with the calcaneo-cuboid ligament ; it communi- 

 cates by a tendinous slip with the fiexor brevis and then divides 

 into three tendons, each of these passes under a sheath formed by 

 the Jtexor brevis, and is inserted at the base of the last phalanx of 

 its digit. 



The Flexor brevis is entirely tendinous and is really nothing more 

 than a continuation of Xhe plantaris^ ; it divides into three tendons, 

 each of which forms a sheath for the longus to go through, and from 

 the inner wall of the sheath small tendons are continued forwards to 

 the base of the second phalanx ; the three sheaths seem to be joined 

 at the side. 



The Lumhncales are four in number ; three of the^e are in 

 connection with longus and one seems to arise from the outer 

 tendon of long and short flexors. 



There are Interossei muscles in each space and on both sides. 



The Gastrocnemius is a large muscle ; it arises from the femur by 

 two heads ; it passes down and is attached to os calcis. 



The Plantaris is a slender strong muscle ; it arises from the outer 

 condyle of the femur ; it passes down under gastrocnemius to os 

 calcis, where it spreads out and passes over a smooth cartilaginous 

 surface u[)on the bone and forms the flexor brevis digitorum. 



The Popliteus is a large muscle ; it arises from the external 

 condyle of femur ; it passes obliquely downwards and inwards to be 



' As in moat other Mninmnls. 



