COKGENITAL MALF0EMATI0N3 309 



Respiratory Apparatus. 



What congenital malformations of the respiratory apparatus 

 are of practical interest ? 

 In puppies, congenital struma is common. The tracliea 

 may "be twisted, excessively dilated or its lumen may be 

 stenosed. In colts, nasal dyspnoea and catarrhal symptoms 

 follow an abnormal development of the turbinated bones. 



Ear. 



What congenital malformations of the ear are of surgical 

 interest ? 

 In Maltese cats; congenital deafness is quite common. 



