501 



As in the Emu, with its tendon passing under the head of the gastro- 

 cnemius to be inserted into the outer tubercle of the tibia. 



N. B. — This tendon binds down the tendon of the gracilis after it has 

 crossed in front of the knee joint. 



24. M. vastus internus (1), (Pig. 33, v. i. 1), . . . . 0*95 oz. 

 Origin and insertion as in the Emu. 



25. M. vastus internus (2), (Eig. 33, v. i. 2), .... 0*95 oz. 

 Generally as in the Emu, but not so easily divisible into three por- 



tions ; inserted into the inner head of the tibia. 



26. M. poplitceus, . . . 0-21 oz. 



E. — Muscles of the Anile and Toes. 

 I. M. gastrocnemius, 11*16 oz. 



a, Outer head, as in the Emu, . 2 81 

 ft, Origin from condyloid pit, . . 1*74 

 7, Inner head, 6-61 



11-16 oz. 



7. This portion of the gastrocnemius takes its origin from the back 

 of the inner condyle, from the inner surface of the anterior tubercle, and 

 from the whole head of the tibia, as well as from the side of the liga- 

 mentum patellae. 



2. If.plantaris, 0*50 oz. 



Arises from the posterior ligament of the knee joint, on the inner side, 

 and is blended at its insertion with the inner surface of the tendo Achillis 

 formed by the gastrocnemius. 



3. M. solceus, 4*12 oz. 



Origin and insertion as in the Emu. Its tendon forms the anterior side 



of the sheath for the tendons of the heel, while the tendon of the gastro- 

 cnemius forms the posterior side ; the secondary slip of the tendon of the 

 solceus joins the side of the tendon of the first flexor perforatus digiti 

 medii at five inches below the heel joint. 



4. M. flexor perforatus primus digiti medii, 0*74 oz. 



Inserted into the near ends of the first and second phalanx of the middle 

 toe. 



5. M. flexor perforatus digiti externi, 0*54 oz. 



Inserted into the distal ends of the first phalanx of the outer toe. 



6. M. flexor perforatus secundus digiti medii, .... 0*27 oz. 



Arises from the outer ligament of the knee joint, and is inserted into the 

 near ends of the ungual phalanx of the middle toe. 



R. I. A. PEOC. VOL. IX. 3 U 



