vai Preface 
at, and with the help of the numerous illustrations the reader will be 
able to refer any fish to the particular run to which it belongs, to 
ascertain its weight and age, and how often it has returned to fresh 
water. Although about sixty illustrations of scales are given, 
thousands had to be collected at all seasons and examined carefully, 
so that a definite conclusion could be arrived at. The illustrations 
are from photographs which, with one or two exceptions, were taken 
by the author from selected specimens. 
To Mr. Charles Baker, High Holborn, London, he is indebted 
for enlarging the photographs of the scales; to the Swantype Co., 
for the blocks from which the illustrations are taken; and to the 
printers, Messrs. R. & R. Clark, who have carried out the work to 
his entire satisfaction. 
lee DE) WU MEIEOYC Jal, 
PERTH, December 1909. 
