iv INTRODUCTION. 



liay serve as a companion to the important works of Day, 

 Couch, Yarrell, and others. 



The classification of the fishes is still under revision, and is 

 likely to remain so for a considerable time, but the system herein 

 is based on the most recent, and was adopted as convenient for the 

 purposes of the book. The list contains the usual number of 

 species included on the strength of one occurrence only in the 

 hope of more, but there seemed to be enough of these single 

 specimen claims without recording the very latest which, though 

 interesting, are certainly beyond the scope of a compact manual 



as this. 



W. J. G. 



