J04 SUBCCTAXEOrS CAUDAL MVOTOMV. 



Confine the animal in stocks, or in default of these, con- 

 ■:trol by means of a twitch and sideline. Cleanse and disin- 

 fect the tail and have it sharply bent by an assistant in the 

 opposite direction to the curvature. Locate the longitudi- 

 nal furrow between the levator and depressor muscles on 

 what has now become the convex side and at the lower 

 margin of the levator and just above v. Fig. 9, insert the 

 tenotome at the most prominent part of curvation, the 

 incision being parallel with the muscular fibers, and push 



Fig. 9. 



Transverse section of the tail. «, caudal vertebra ; c, sacro- 

 coccygeus lateralis muscle ; e, sacro coccygeus superior ; f, 

 depressor longus and brevis muscles ( saero-coccygeus infer- 

 ior); 7, intertransversales muscles ; a, coccygeal artery ; 5, su- 

 pero-lateral coccygeal artery ; /, infero-lateral coccygeal ar- 

 tery ; -v, caudal veins (dorsal, ventral, lateral) ; sch, caudal 

 fascia ; h, skin. 



the instrument entirely through the muscle to the vertebra, 

 then turning the cutting edge upwards, at the same time 

 advancing the point toward the median line, .sever the 

 entire muscle. 



The superior lateral catidal artery, s, Fig. 9, bleeds pro- 

 fusely if severed, and wounding of it may usually be 

 avoided by withdrawing the tenotome a trifle in passing 

 that point. 



