DISEASES OF THE BONES 403 



articular surface of the os suffraginis was denuded of carti- 

 lage anteriorly ; the os corona was fractured into eight 

 moderate sized, irregular fragments, and ten minute pieces. 

 The surface of the perforans tendon as it glides over the 

 smooth surface at the back of the os coronae was lacerated, 

 and minute portions of the bone were found embedded 

 therein.'* 



2. ' Here, again, fracture was the result of the animal 

 bolting with his rider. Trying to avoid collision with a 

 conveyance coming towards him, the animal slipped on 

 a wooden pavement, sliding along until his near fore-leg 

 came in contact with the wheel of a standing cab. There 

 was considerable swelling from the knee downwards, great 

 pain, and evidence of fracture in the region of the pastern. 



' Post-mortem revealed the os suffraginis broken into 

 about thirty pieces, and the os coronte with a piece broken 

 off the inside of its proximal end.'t 



3. * The patient was a brown mare used for heavy van 

 work in London. About January 10 she was lame, and as 

 she had a cracked heel, was treated by poulticing for a day, 

 and then by antiseptic lotions. In a week she was sent to 

 work, but the following day lameness returned, and con- 

 tinued till about February 15. No special symptom was 

 detected which indicated the exact position of any cause of 

 lameness. Then the lameness increased in severity, and 

 some swelling around the coronet began to show itself. 



' In consultation with another veterinary surgeon, two 

 possible causes of this intense lameness were discussed : 

 one, that we had septic infection of the coronet, and that 

 probably the swelling of this part would soften, and sloughs 

 occur ; the other, that a fracture of the os pedis or os 

 coron?e existed. The enlargement of the coronet was hard 

 and firm, not particularly sensitive. It was decided to do 

 nothing for a few days. In a week the pain abated, and 



* E. Wallis Hoare, F.R.C.V.S., Veterinary Record, vol. xiv., 

 p. 133. 



t A. F. Appleton, M.R.C.V.S., Veterinary Journal, vol. xiii., 

 p. 411. 



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