Fig. 20. — "Bull Trout" {^{Ih.j frum the River Aln. 





3ril year. 



2iid year. 



1st year. 



at in a' 



Fig. 2 1.- Scale of River Aln " Bull in.ul " (,lilb.), indic 

 growth similar to that of a .salmon gril.se. 



Fresh water liie, 2 years ; after iingratioii, ii, .year^^. Age, Si years. ( ' 32). 



Si'f page 05. 



