494 



7. M. flexor perforatus digiti interni, . . 015 "i nift 



. . 0-20 J ' * U ' lb ° 7 " 



This little muscle arises from the outer fascia of the knee joint, 

 overlying the tendon of vastus externus (2), and is inserted at both 

 sides of the distal end of the first phalanx of the inner toe. 



8. M. flexor hallucis longus, 0*4) 1-00 oz 



„ ..... 0-6 J ' ' oz ' 



Arises from the back of both heads of the flexor perforatus of the 

 middle toe, and is inserted on the outer side of the near end of first 

 phalanx of inner toe. 



9. M. flexor communis perf or ans, .... 2*4) „ on 



.... 4-0/' ' d-2Uoz. 



This muscle is formed of two totally distinct muscles, whose sepa- 

 rate tendons unite into a common tendon two -thirds down the cannon 

 bone. 



a > fl} ' ' °' 90oz - 



* : : : : . : : #V- ■ 



Total, .... 3-20 oz. 



a. Arises by a double head from the backs of both condyles of the 

 femur ; its tendon passes through a sheath formed in the Ug amentum 

 calcis, on the outer side of the inferior ridge of the cannon bone. 



/3. Arises from the whole posterior surfaces of the tibia and fibula, 

 except the portion of the tibia occupied by the poplitceus. 



N". B The united tendon of the perforans bifurcates, at the meta- 



tarso phalangeal articulation, to the ungual phalanges of all the toes, 

 and at its point of bifurcation a small auxiliary muscle (0*05 oz.) unites 

 the tendon with the posterior border of the sesamoid ligament, under 

 the groove of which the common tendon passes. 



10. M. tibialis anticus, 4-6 



5-1 }• • 4 - 85oz - 



This muscle is bicipital, and arises from the anterior and outer 

 tubercles of the tibia and the surface of bony ridge joining them ; and 

 (as in the Dog and other animals) by a long, beautiful, round rope- 

 like tendon, from the point of the outer condyle, inside the knee joint. 



It is inserted into the near end of the cannon bone, in front of the 

 heel, first passing under a " dead eye " ligamental bolt on the front of 

 the tibia. 



11. 31. extensor communis digitorum longus, 



1-2} 



1-4/ * ' 



1-30 oz. 



Arises from the front of the tibia, on the outer side of the ridge run- 

 ning down from the anterior tubercle, and is inserted bv tendons 



