Description of Bones found in a PicVs House. 209 



extremity and the first premolar socket. There is a slight 

 metallic crust on the inner surface of the teeth, very distinct 

 on the third tri-columnar premolar. The remaining fragment 

 in this collection, No. 15, is the upper half or nearly two- 

 thirds of the right middle metacarpal or cannon bone of a 

 small-sized horse, from which the upper articulating surface 

 is separated ; the canal for the medullary vessels is recurrent, 

 and placed close to the outer edge of the groove for the inter- 

 nal splint bone. The fore cannon bone in the horse is more 

 flattened in an antero-posterior direction than it is in the 

 hinder extremity, as in the latter it is somewhat compressed 

 at the sides, and more rounded. 



