100 REPORT OF THE COMMISSIONER OF FISH AND FISHERIES. 



iiiyxosporidian ('a[).sule, and the evidence against the myxomycete 

 theory becomes very stronji'. 



IV. DISTRIBUTION. 



From the practical standi)oint there is no more important branch of 

 the subject than the conditions under which the growth of the parasite 

 takes phrce. Ck)sely rehited to tliese conditions is its distribution as 

 regards host and organ, space and season. 



ZOOLOGICAL DISTRIBUTION. 



The following table includes all the doubtful and true Myxosporidia 

 (species 7 to 102) arranged zoologically by hosts. This arrangement 

 reveals a few correlations between the taxonoinic relations of the hose 

 and those of the parasite. 



