110 THE MUSCLES. 



its middle, which becomes free towards its posterior end; the 

 tendon passing 1 inwards under the ligamentum tarsi transversum 

 through a groove on the hinder extremity of the astragalus in an 

 arched direction, to be inserted into the os naviculare, which bears 

 the rudimentary great toe and the os metatarsi 1. 



(III.) Muscles of the first toe. 



152. M. abductor longus digiti I (Figs. 88 al.i, 90 a.b. i). 



It takes its origin from the inner border of the aponeurosis plan- 

 farts, and lies on the plantar surface of the abductor hallucis. Its 

 tendon runs in the hollow which the great toe forms, and is in- 

 serted into the inner side of the os metatarsi I. 



153. M. flexor brevis digiti I (Fig. 90 F.6.i). 



A small, thin muscle, which arises from the anterior extremity 

 of the os metatarsi II, and is inserted into the basal phalanx of the 

 first toe. In this small muscle, and also in the m. lumbrical. dig. V 

 (Fig. 89 ^.5.), the nerve distribution may be very well seen. 



154. M. opponent dig. I (Fig. 90 op). 



Duges, sous-metatarso-plialangien du pouce, n. 192. 



This is situated to the inner side of the preceding muscle, arises 

 from the os metatarsi II somewhat narrow, widens in a fan-like 

 manner towards the os metatarsi /, into the anterior half of which it 

 is inserted. 



(IV.) Muscles of the second toe. 



155. M. flexor metatarsi dig. II (Fig. 90 F.m.2). 



Duges, sous-tarso-metatarsien du II doigt. Klein, extensor metatarsi. 

 By a narrow origin from the hinder end of the calcaneum, poste- 

 riorly this muscle becomes broader and is inserted, somewhat thinned 

 out, into the plantar surface of the second os metatarsi. 



156. M. flexor dig. II proprius (Fig. 90 F.p.i\ 

 Duges, sous-metatarso-phalangien, n. 194. 



It arises from the plantar surface of the os metatarsi 77, and is 

 inserted by a thin tendon into the plantar surface of the first 

 phalanx. 



Duges describes this and the analogous muscles of the third, 

 fourth, and fifth toes (F.p.^, 4, 5) as the iuterossei plantares, a no- 



