Vol. XIV. -j Leach, The Myology of (he Dell- Mag pie. 27 



of the next muscle (119). The tendons of these two muscles now 

 separate ; that of the present muscle runs to the outer toe, and 

 forms a tubular sheath for the passage of the perforating tendon 

 of the deep flexor (122). It sends down two short slips, one to 

 ])e inserted on each side near the distal end of the basal phalanx. 

 It again runs on and finally bifurcates into two sUps, one being 

 inserted into each side of the base of the second phalanx. Thus 

 it serves as two perforated tendons inserted into two phalanges 

 of the fourth toe. 



119. The flexor perforatus medius primus pedis [41] [43] [44] is 

 the flexor muscle that is perforated by the deep flexor (122) on the 

 medius (third toe), and is inserted on the basal phalanx of that 

 toe. It arises fleshy from the beginning of the fleshy part of the 

 flexor perforatus annularis primus pedis (118), and becomes con- 

 verted into a flattened tendon. This runs, in company with the 

 tendon of muscle 118, through the tibial cartilage and the hypo- 

 tarsus down to the under side of the toes. The tendon forms a 

 sheath for the deep flexor (122) and bifurcates. Each sUp is 

 inserted on either side about the middle of the basal phalanx of 

 the medius toe. 



120. The flexor perforatus medius secundus pedis [42] [43] [44] 

 is the flexor muscle whose tendon is perforated on the medius 

 toe, and is inserted into the second phalanx of the toe. The 

 muscle arises from the external condyle of the humerus, from the 

 fascia about the knee, and from the tibia, the fibula, and neigh- 

 bouring muscles. It is a large fusiform muscle, forming a strong, 

 flat tendon. This passes through the tibial cartilage and the 

 hypotarsus to the under part of the third toe (medius). It per- 

 forates the tendon of the basal phalanx (119), and forms a sheath 

 to be perforated by the tendon of the deep flexor (122). It then 

 bifurcates, and is inserted into either side of the second phalanx 

 of the medius toe. 



121. The flexor perforatus indicis primiis pedis [42] [43] [45] is 

 the flexor that is perforated by the tendon of the deep flexor on 

 the index toe, and is inserted on the basal phalanx. It arises 

 just posterior to the flexor perforatus medius secundus pedis (120) 

 from the external condyle of the femur by a thin tendon. It 

 becomes fleshy, but soon narrows and becomes converted into a 

 strong tendon. This passes through the tibial cartilage and the 

 hypotarsus. It passes to the second toe, and, after forming a 

 sheath for the passage of the deep flexor (122), it bifurcates, 

 and the shps are inserted into either side of the basal phalanx 

 of the index toe. 



122. The flexor perforans digitorum profundus [43] [44] [45] [4^1 

 agrees with this muscle, as described by Shufeldt, in the Raven. 

 It arises from the hinder part of the external condyle of the 

 femur, from the upper part of the posterior aspect of the tibia, 

 and from the posterior face of the shaft of that bone. It tapers 

 directly downward into a strong tendon, which passes through 



