495 



distributed to the ungual phalanges of all the toes, and to the tendinous 

 sheath of the first phalanx of the middle toe. 

 12. Flexor digitorum brevis et abductor digiti 



The flexor brevis arises from two inches of the outer and back sur- 

 face of the near end of the cannon bone, and unites with the abductor 

 by a long slender tendon running the whole length of the cannon bone ; 

 the abductor arises from the outer and under side of the distal end of 

 that bone, for a space of 1 \ inch, marked off by a slight bony ridge ; 

 and the common tendon is inserted into the outer side of the near end 

 of the first phalanx of the outer toe. 



13. Abductor hallucis et extensor digitorum 



brevis ' ■ - • • oil - °' 20oz - 



These muscles are inseparable ; and the abductor arises from an 

 inner surface of the under and distal end of the cannon bone, marked 

 off by a slight bony ridge, like that of the abductor minimi digiti, while 

 the extensor takes its origin by a thin sheet of muscular fibres from the 

 whole breadth of the upper surface of the distal end of the cannon bone, 

 for the space of one inch. 



externi, 



Fig. 31. 



D. — Muscles of the Wings. 



The anterior limbs in 

 the Emu are much smaller 

 than in the Ostrich and 

 Ehea, and are hidden al- 

 most completely by the 

 plumage. The following 

 sketch (Pig. 31) gives a 

 very good idea of the re- 

 lative proportions of the 

 bones of the wing and 

 sternum ; and in it, the 

 initial letters indicate the 

 parts. 



Takes its origin from the 

 first, second, and third ribs, 

 and subcutaneously, from 

 the skin covering them ; 

 and is inserted into the cla- 

 vicle, acromion ridge, and 

 anterior two-thirds of the 



sc., Scapula. 

 cl, Clavicle. 

 acr,, Acromion. 



cor., Coracoid. 

 St., Sternum. 

 h., Humerus. 



scapula. Its posterior fibres 



slant forwards. 



