MUSCULAR ABNORMALITY IN THE CAT. 



337 



the skin. This band of muscle formed a very distinct, rather 

 thick slip. 1 The relations of all the other muscles of the leg 

 were normal. The two tendons of insertion normal to the latis- 

 simus dorsi were present and in their usual relations. The ab- 

 normal slip was simply added on, as it were, to the muscles 

 normally present. 



clv.br. 



pct.mn. 



XphK. 



FIG. I. Ventral view of left side of the thoracic region in cat, showing abnormal 

 insertion of the M. latissimus dorsi. dv. br., M. clavobrachialis ; pabr, , M. pectoan- 

 tibrachialis; epit., M. epitrochlearis ; //. ds., M. latissimus dorsi; xph/i., M. xiphi- 

 humeralis ; pet. ;/., M. pectoralis major; pet. ma., M. pectoralis minor; x, ab- 

 normal slip of M. latissimus dorsi ; y, portion of the latissimus dorsi which joins the 

 pectoralis minor. 



The conditions found in this case of the latissimus dorsi insert- 

 ing in three portions, one of which does not reach the humerus 

 at all, is apparently unique. So far as I have been able to dis- 



1 In another cat dissected by a student in the laboratory precisely the same arrange- 

 ment was found, except that the mucle slip was much thinner than in the case here 

 described. Only a few fibers reached the pectoantibrachialis. 



