PRINCIPLES OF VETERINARY SURGERY 



641 



bones are not changed. The modifications affect the trans- 

 verse diameter. The hyperostoses are exhibited in the 

 form of porous vegetations with uneven surfaces, very ir- 

 regular, mammillated, granular, and furrowed with narrow 

 fissures. It seems that a great number of bony stalactites 

 may be agglomerated without being soldered together. 



Fig. 103. 

 Osteoperiostitis of the Tarsus and Metatarsus. 



These vegetations are anything but solid. They are easily 

 detached and crushed and thin lamellse maybe removed 

 from them with a knife. They are spongy. Transverse 

 sections of the tibia, radius, etc., show that the original bone 

 is well formed, and that it preserves its structure, its resist- 

 ance and its dimensions, but the internal face is incrusted 

 more or less thickly with a spongy bony tissue. 



