THE LOCOMOTOR SYSTEM. 257 



is that the elbow-joint, partially or entirely, loses its 

 ginglymoid character, and cannot support the weight of 

 the body, so it yields under the animal. An interesting 

 case is recorded by Wolstehholme (' Veterinary Journal,' 

 xi, p. 342). The patient was a five weeks' old, silver- 

 haired, terrier, dog puppy. Each forearm was twisted 

 from the elbow, so that the radius along its entire length 

 was on the ground. The anterior surfaces of the carpi 

 met and touched, from which point the fore paws were 

 sharply turned outwards, with their plantar surfaces at right 

 angles to the ground. The outer surface of each humerus 

 was concave to admit the displaced elbow ; progression was 

 difficult. The patient was healthy, but, of course, the 

 deformity did not admit of cure. In cases of congenital 

 malformation or acquired contraction of tendons, tenotomy 

 has been successfully performed on the dog. The flexors 

 of the foot are not infrequently thus divided ; and Peuch 

 mentions successful section of the external and oblique 

 flexors of the metacarpus some distance above their 

 insertion into the subcarpal bone. 



Cancerous Diseases op Bones, as also Ostitis, Perios- 

 titis, and other simple diseases present no special features 

 in the dog ; Bouley and Paugre have amputated at the 

 shoulder-joint in incurable lesion of the limb ; the patient 

 remained useful as a watch-dog. 



17 



