154 BULLETIN OK THE BUREAU OK KISHERIES. 



While many dark puzzles have been solved, and many questions, raised fifteen 

 years or more ago, can now be answered with assurance, no enterprising or resourceful 

 worker need be told that the field is still fertile for fuller or more exact researches in 

 many directions. "We Kope that some of these subjects will be suggested by the imper- 

 fections of the present work when attention is not called to them directly. 



F. H. HERRICK. 

 Cleveland, Ohio. 



