MYOLOGY 



53 



tendinous insertion is upon the mastoid process of the 

 squamosal. In Teonoma origin is from the last cervical 

 and first two thoracic vertebrae. 



M. multifidis spinae (figs. 6, 12). The fibers of this 

 muscle, lying between the longissimus dorsi mediahs and 

 the middorsum, have origin from the diapophyses, and 



> -- rect. c-a-Tg. lit. 



— obUc^. C3.p SU'p. 



' '*♦ ^ - tM\.t\. ca-ig. VT\S;e.r. 



Fig. 11. A, Deeper, supravertebral muscles of the cervical region of 

 Homodontomys: more superficial upon the left, deepest to right. 



B, Decussation of caudal termination of the rectus abdominis muscles 

 of Homodontomys. (a, representing wire hooks.) 



insertion upon the bases of the spinous processes, of the 

 second vertebrae craniad of the origin. The caudal por- 

 tion of this muscle is known as the extensor caudae medialis. 

 No deeper division was differentiated. 



The innervation of these three muscles is by branches 

 of the spinal nerves. 



