418 Harris Hawthorne Wilder, 



surface of tlie centrale instead (cf. Fig. 36 and 37). The muscle 

 inserts in the form of two adjacent bundles into the dorsal (inner) 

 surface of the plantar fascia, involving a large area. 



M. fibularitarsalis (fbt). This muscle consists of a long* 

 narrow band, running lengthwise through the mass of flexor muscles 

 of the lower leg. It arises lipon the flexor surface of the fibula, 

 near its proximal end, almost continuous with the line of origin of 

 the pronator. The band-like muscle, during its course, rests upon 

 the last named, crossing it near its origin, with the fibers of the two 

 muscles almost at right angles, and near its distal end parts the 

 fibers of the plantaris profundus, to insert into the flexor surface of 

 tarsale 4 — |— ö, near its distal margin, and thus adjacent to the 

 points of origin of the Mm. tarsometatarsalia. 



M. flexor fibularis (ffb, rud. 1, rud. 2). This muscle, so 

 large and well-developed in the anterior limb, is almost wanting in 

 the foot, but seems to have left traces in the form of two very small 

 muscles, the one extending froin fibula to fibulare (Figs. 31, 33, rud. 1), 

 the other from fibulare to tarsale 4 -\- 5 (Fig. 33 rud. 2). The 

 insertions of these two rudiments correspond closely to those of the 

 two bundles that form the longer mass of the flexor ulnaris (cf. 

 Figs. 36 and 37), a significant point if it be taken into consideration 

 that in the limb muscles the insertions, which are the distal 

 attachments, are much more constant than the areas of origin, since 

 the latter fluctuate with the extent of development, and thus vary 

 with the size of the muscle, while the former, being the point at 

 which the power is applied, cannot vary at all without modifying 

 the physiological action of the whole muscle. The origins of these 

 two rudiments are as close to the insertions as tliey can possibly 

 be, the one from the distal margin of the fibula, the other from 

 that of the fibulare. There is no Suggestion of an origin from either 

 the fernur or the shaft of the fibula. 



M. flexor tibialis (ftb). This muscle, altough forming a 

 thin sheet, and easily overlooked, is still in evidence and clearly 

 represents the flexor radialis of the anterior limb. It is nearly 

 covered by the large pronator, and, as the two are similar sheet- 

 like muscles and almost coincident, they are easily taken for a 

 Single one. It arises from the middle of the distal end of the 

 femur, and is at first somewhat fusiform, but soon spreads out into 

 a thin sheet, and inserts along an oblique line that runs across the 

 distal third of the tibia and a part of the tibiale (Fig. 31) ; it thus 



