MUSCULAR SYSTEM 



.77 



B 



Sphincter 

 colli 



Pe.ctmalix 



a I-, a 



1 Spin i>i-/i i- 



11 Mlllllllllll'll 



gland 



cloficce 



C/oara 



A, ventral view of male Or- 

 niihorhynchus ; B, ventral 

 view of male Echidna ; C, 

 lateral view of the head 

 and neck of Echidna, all 

 the muscles shown in which 

 are supplied by the facial 

 nerve. 



Sphincter colli 



Fid. 138. A C, THE INTEGUMENTARY MUSCLES OF MONOTREMES. (After Huge. 



N 



