28 STUDIES IN COMPAEATIVE ANATOMY. 



and slightly inwards to its insertion into the metatarsal of 

 the 2d digit. It crosses the tendoa of tibialis posticus, close 

 to its insertion. Tibialis anticits is fleshy almost to its ter- 

 mination. 



C. and L.— 285-6 (S) ; 287-8 (S) ; 289, figs. 1, 2 (8) ; 292-3. 

 Mayer states that this muscle is inserted into the cuboid and 1st 

 and 2d metatarsals. 



Extensor communis digitorum arises from the tibia, external to 

 tibialis anticus, for nearly the whole length of the bone ; also 

 from the intermuscular septum on its outer side. Passing down- 

 wards, it spreads out, and becomes tendinous over the tibio-tarsal 

 articulation. It finally divides into four slips, which are inserted 

 into the upper surface of the digits. The tendons to the third 

 and fourth toes are much stronger than the rest. That to the 

 fourth gives off a slip to the base of the proximal phalanx, an 

 arrangement which does not exist in the other tendons. 



C. and L.— 274-5 (^ ; 276-7 (0 ; 285-6 (^) ; 287-8 (^ ; 289, 

 figs. 1, 2 (^) ; 292-3 (^). The slips appear more distant from 

 each other in the drawings than in our dissections. 



Extensor hrevis digitorum has an oblique origin from the 

 dorsum of the tarsus, following a line drawn to connect the 

 external malleolus with the base of the second metatarsal. The 

 dorsal vessels pass between the two main divisions of the muscle, 

 close to its origin. The outermost and highest head of extensor 

 hrevis is partly concealed by a strong ligamentous band con- 

 nected with the external lateral ligament. Opposite the heads 

 of the metatarsal bones the muscle blends with the under 

 surface of the tendinous expansion of extensor communis digit- 

 orum, but the deeper fibres pass into a strong ligament which 

 encloses the heads of the metatarsals and the bases of the first 

 phalanges. No part of the muscle is attached to the first or 

 second digits. 



C. and L.— 276-7 {6) ; 287-8 ((9) ; 289, figs. 1, 2 ((9) ; 292-3 

 (6). Mayer's brief account is very accurate. 



We have not found the muscle named extensor of the meta- 

 carpus, and lettered -|- ^ by Cuvier and Lauiillard. 



Tibialis posticus is concealed beneath flexor longus digitorum. 

 It arises from the posterior surface of the tibia, below what 

 answers to the oblique line ; from the adjacent surface of the 



