ACE. 



This volume is fourth and last of a descriptive catalogue of the fishes 

 and fish-like vertebrates of North and Middle America. Part I, Brancliios- 

 tomatidfp to Pr'ntnnilli'uliv inclusive (pp. 1 to 1240), was published October 

 3, 1896; Part II, Lut-ianithr to Cephalicanthidse indueivQ (pp.1241 to 2183), 

 was published Octol>er 3, 1898; Part III, CaUionyinidse, to Ogcocephalidse 

 inclusiv^ including also "Addenda,'' an "Artificial Key to the Families 

 of the True Fishes," a "Glossary of Technical Terms," and an "Index" 

 complete for Parts I, II, and III (pp. 2183 to 3136) , was published Novem- 

 ber 28, 1898; and Part IV, the present volume, appears on June 26, 1900. 

 Since the publication of Part III, investigations by Dr. Jordan, iai Mex- 

 ico, and by Dr. Fvermann, in Puerto Rico, have added greatly to our 

 knowledge of the fishes of those regions, and have made it desirable to 

 incorporate in the present volume 1 ! still further addenda. 



Recent studies by Dr. (Jiinther, of certain Linnsean types, show that 

 some changes in nomenclature are necessary, which are also included. 



DAVID STARR JORDAN. 

 BARTON WARREN EVERMANN. 

 LELAND STANFORD JUNIOR UNIVERSITY, 

 PALO ALTO, SANTA CLARA COUNTY, CALIFORNIA. 

 March 15, 1900. 



(Ill) 



