CHAP. V.] 



THE CAT'S MUSCLES. 



130 



Other minor divisions of the erector spinac Lear the names semi- 

 spinalis, muUifidm spin, rotatorcs spince, intcr-spinales, and inter- 

 tramrcrsales, and have their fibres directed as follows : at first, from 

 the transverse processes to the neural spines; the second, from 

 metapophyses (or the parts which serially correspond with the met- 



-sin. 



ts 



S A 



rig. rs 



A. INTERNAL ASPECT OF STERNUM AND COSTAL CARTILAGES MUSCLES OK LEFT SIDE BEING 



ALMOST ALL REMOVED. 



No. 1 to 13. The ribs. 



V, VI. The fifth ami sixth sternebiw. 



<?. Diaphragm. 



'-. Internal intercostal*. 



i. External intercostal*. 



io. Internal oblique. 



sm. Sterno-mastoid. 



-s 2 . Sealenus secundns. 



I ts. Triangularis sterni. 



x. Xiphoid cartilage. 



The small figure below represents on one side 

 the sternal ends of the cartilages of the eighth 

 and ninth ribs, and on the other side the 

 sockets (/) for the cartilages of the eighth 

 and ninth of the other side. 



13. ARTICULATIONS OF CERTAIN COSTAL CARTILAGES AND STERNUM. 



apophyses,) to neural lamimc in front of them ; the third, from the 

 transverse processes to the neural lamina) next in front of them ; 

 the fourth, from neural spine to neural spine, and the fifth and last, 

 from one transverse process to another. 



If these various muscles of both sides of the body act, they flex 

 the spine vertically as when the animal bounds along. If those of 



