PREFACE. 



The present volume is the second part of a work descriptive of the 

 fishes of North and Middle America, including all species known to occur 

 in American waters north of the equator and of the Isthmus of Panama. 

 The lirst part was published on October 3, 1896, the present part, continu- 

 ous with the first in pagination and numbering, appears on October 3, 1898, 

 and the third and final part will soon follow. In this last will appear the 

 general index, an artificial key to the families, a glossary of scientific 

 terms, and an addendum containing all species overlooked or described 

 subsequent to the publication of the part to which they belong. A fourth 

 volume, or atlas, is composed entirely of plates. 



David Starr Jordan. 

 Barton Warren Evermann. 

 Leland Stanfobd Junior Universitt, 

 Palo Alto, Santa Clara County, California. 

 March 15, 1S9S. 



(Ill) 



