PLATE III. 



SPAVIN AFTER MACERATION. 



Plate III. The same spavin (as is represented in Plate II), after having been 

 subjected to maceration. 



a, Os calcis. 



b, Large metatarsal or hind cannon bone. 



c, Small metatarsal or hind splent bone. 



d, Astragalus. 



e, The superior eminence of the ossification constituting the veritable hone spavin, 

 now, after maceration, having a rugged aspect, and standing out in rocky 

 prominences, in consequence of having become deprived of its nidus or bed of 

 fibro-cartilage. 



g, The inferior extent of ossification, spreading down for some distance upon the 

 cannon bone. 



/, /, The most prominent or perceptible parts of the spavin tumour during life. 



h, The large cuneiform bone coated with osseous matter, of the same porous 

 nature as the tumour itself is composed of, from which, in fact, it is an extension. 



I, The middle cuneiform bone, underneath the former, coated after the same 

 manner, and equally involved in the bone spavin disease. 



m, n, The osseous deposition, after completely burying the inner cuneiform bone, 

 as well as the head of the inner small metatarsal bone, spreads in an outward 

 and downward direction, and covers the major part of the supero- anterior 

 portion, or head and neck of the large metatarsal bone ; so that there is, in 

 point of fact, nearly as much bone spavin in front as in the usual place upon 

 the side of the hock and cannon. 



