644 



PRINCIPLES OF VETERINARY SURGERY 



attention since 1750, at which time Daubenton referred to 

 it in Buiifon's Natural History. After Daubento,n, Offa, 

 Owen (1853) and Dareste (1867) referred to the existence 

 of the disease. The latter described it in a course of lect- 

 ures while connected with the Faculty of Sciences in Lille. 



Fig. 105. 

 Section of the Extreme Upper Portion of the Tibia. 



Later, Delchambre, Barrier, Petit and Delplamque pub- 

 lished more or less complete accounts of the affection. 



DESCRIPTION. — Subjects attacked with achondro- 

 plasia are never well developed. They appear to be short- 

 ened in the anteroposterior direction, the anterior part of the 



Fig. 106. 

 Section of the Upper Part of the Metacarpus (Radiograph) . 



body being, as usual, better developed than the posterior. 

 The bones of the limbs are small and their imperfect devel- 

 opment consists .chiefly of a shortening of the bones radiat- 

 ing directly from the vertebral column. As a general rule 

 achondroplastic subjects are micromeli. The limbs may 

 have their normal direction, but frequently, they are more 



