Plate C. 
Fig. 102. — Control for fig-ure 103. Fisli 1090. tjible xii. X86. 
Fi(,. 103. — Donie.sticated brook trout from the same lot ns fig-ure 102. treated with bichloride of merc\iry added by 
contimiou.s flow to the water in the proportion of 1 : 5.0()0.00i) for 12 days. Disappearance of h> ])erplasia. Mc'irked reversion 
to the normal type. Fish 1089. table xii. X86. 
