Introduction xix 



Of the other abbreviations used in this volume, the following require explanation 

 here: 



SL — standard length 



FL — fork length 



hi — head length 



m.w. or m.w.o. — meters of wire or meters of wire out, used in lieu of depth of 

 capture when discussing the catches of nets fished at indeter- 

 minate depths and not equipped with closing devices. 



Finally, acknowledgment with gratitude is extended to all of the authors who 

 contributed to this volume and to the institutions that supported their work; to the 

 Sears Foundation for Marine Research, Yale University, and to Mr. Henry Sears for 

 his assistance in financing publication; to the National Science Foundation for funds 

 to finance part of the cost of research (through grant NSF G 7123); and to the numer- 

 ous ichthyologists and many others who have contributed information for this volume. 



Henry B. Bigelow 

 March 1963 Editor-in-Chief 



