194 ME. E. E. BEDDAED — CONTEIBUTIONS TO THE 



those supplying the three middle digits lie between the metatarsals, the first of them 

 lying between the second and third metatarsals ; their tendons arise at the commence- 

 ment of about the last third of the metatarsals. 



(25) Peronceus longus. — This is the outer of the two peroneal muscles (there are 

 only two) ; it arises from the fibula and from the septa between itself and adjacent 

 muscles. 



(26) Peronceus hrevis arises from the fibula and from the septa between itself and 

 adjacent muscles ; its tendon, which is superficial to that of the last muscle, is inserted 

 on to the outer side of the head of the first metatarsal ; some way before its insertion 

 it gives off a A'ery fine tendon, which passes along the extensor surface of the last meta- 

 tarsal; at the end of this bone the tendon passes over to the outer side and joins the 

 tendon of the long extensor of this digit. 



(27) Gastrocnemius. — This has the usual two heads, which join at about the middle 

 of the calf. The outer head is entirely tendinous at its origin from the external 

 tuberosity; for half an inch or so from the point of origin it is fused with the fleshy 

 head of the plantaris; the tendon spreads out over the outer surface of the muscular 

 belly, and gradually dies away. The inner head is half fleshy and half tendinous at its 

 origin, which is more extensive than that of the outer head, extending as it does over 

 the condyle ventral of and behind the tuberosity as well as from the tuberosity itself; 

 the relative positions of the fleshy and tendinous parts of the head of origin are precisely 

 those of the fleshy flantaris and the tendinous head of the outer half of the gastro- 

 cnemms ; the fleshy parts are both internal. The tendon spreads over the upper surface 

 of the muscle and reaches back rather further than in the case of the outer head; the 

 conjoined muscles become tendinous on the inner surface some distance in front of their 

 insertion (largely muscular) on to the calcaneum. 



(28) The salens may be regarded as a third head of the gastrocnemius, which is, 

 however, distinct from it nearly up to the point of their common insertion. The muscle 

 arises from the lower surface of the head of the flbula; its origin is fleshy above; 

 below there is a layer of tendon, which extends back, covering nearly the whole of the 

 ventral surface of the muscle, to about the middle of the calf of the leg ; further back 

 still it is the upper surface which becomes tendinous. 



(29) Plantaris. — This is a slender muscle, arising, as already mentioned, in common 

 with the outer head of the gastrocnemius ; the muscle passes into a slender tendon ; 

 four inches from its origin this tendon passes between the gastroc7iemius and the soleus, 

 though in closer connection with the former. 



(30) Popliteus arises from the external condyle of the femur by a strong thick tendon ; 

 this passes just beneath the external ligament of the knee ; the muscle is inserted on 

 to the head and shaft of the tibia along a line measuring three inches in length. The 

 tendon of origin of the muscle ends in the interior of the muscle, being ensheathed in 

 muscular fibres. 



