The Muscles 125 
post. and pb. is. f. m. post.) (Adductus [partim], 
Gemellus, Obturator internus). Springs without 
tendon from the whole caudally directed border of 
the ischium. It is inserted, by a short tendon, 
near and laterad to the tendon of the ischio-femo- 
ralis muscle, on the hinder surface of the upper leg. 
Extensor Longus Digitorum (Plate V., Figs. 2 and 
3, ext. 1. [long.] dig.) (Long extenseur commun, 
Gemeinschaftlicher Fussheber oder Beuger, Exten- 
sor communis digitorum). Springs, together with 
the tibialis anticus, from the external condyle of 
the femur, goes with this muscle under the liga- 
mentum tibio-fibulare and after union with this 
divides into four short tendons. Three of these 
tendons are inserted on the fibular side of the bases 
of the first three metatarsal bones; the fourth goes 
over into the muscle of the third toe. 
Tibialis Anticus (Plate III, Fig. 1, tib. ant., 
Plate IV., Fig. 4, tib. ant., Plate V., Figs. 2 and 3, 
tib. ant.) (Jambier antérieur, Vorderer Schienbein- 
muskel). Springs by a fleshy tendon from the 
anterior surface of the head and neck of the tibia 
and quickly unites with the following muscle. 
Peroneus Anterior (Plate V., Figs. 2 and 3, peron. 
ant.) (Peroneus longus). In the alligator. Its 
origin: it extends from the insertion of the ilio- 
fibularis muscle distalwards by the whole outer 
surface of the fibula, under the skin and over the 
ligamentum tibio-fibulare, and gives off a broad, 
tendinous portion to help strengthen the tendon 
