1884.] 



DISEASES OF CARNIVOROUS MAMMALS. 



179 



(1) A layer of normal hyaline cartilage, which in health should not 

 exceed a millimetre in thickness, but here it may measure as many 

 as six, eight, or even twelve millimetres. 



(2) A regular series of columns formed of superimposed cartilage- 

 cells, which in health should consist of tea or twelve cells to the 

 column, each column being separated from its fellow by a spicule of 

 calcareous matter, all arranged as regularly as a phalanx of soldiers. 

 But in rickets as many as fifty cells may be counted in each row, 



Fig. I. 



The left half of the thorax of a Biutui-ong {Arctictis bhiturong), severely affected 

 with rickets. It shows the usual beading at the juneti(jns of tlie ribs and 

 costal cartilages, and a second row of beading just below the angles of 

 the ribs, due to partial fracture and the subsequent formation of provi- 

 sional callus. 



arranged in a disorderly manner, the confusion of disease contrasting 

 remarkably with the definite order observable in the healthy epi- 

 physes. 



(3) Beyond these, a layer of irregular calcareous trabeculse 

 enclosing here and there "islets" of spongioid tissue and hyaline 

 cartilage. 



