140 



FISHERY BULLETIN OF THE FISH AND WILDLIFE SERVICE 



question, it is generally accepted that there is but 

 one species of Atlantic sailfish: Istiophorus ameri- 

 canus (Cuvier). In accordance with Bailey's re- 

 view (1951) of the authorship of Cuvier and 

 Valenciennes (1831), the single authority is used 

 here as opposed to the common use of both 

 names. 



Other members of the staff and members of the 

 crew of the Theodore N. Gill assisted in the collec- 

 tion of specimens and various other aspects of the 

 study. Special thanks are extended to Isaac 

 Ginsburg for loan of specimens and for critical 

 reading of the manuscript; to Leonard P. Schultz 

 of the U. S. National Museum for information and 

 loan of specimens; to Royal D. Suttkus of Tulane 

 University, Loren Woods, of the Chicago Natural 

 History Museum, Giles W. Mead, Robert M. 



Yount of Myrtle Beach, S. C, and Tony Seaman 

 of Morehead City, N. C, for loan of specimens; to 

 Stewart Springer for data ; to Albert W. Collier, Jr., 

 and Edgar L. Arnold, Jr., for loan of specimens 

 and critical reading of the manuscript; and to 

 Frank T. Knapp of the Georgia Game and Fish 

 Commission and George F. Arata, Jr., of the 

 Florida Board of Conservation, for critical reading 

 of the manuscript. 



METHODS AND DATA 

 METHODS OF MEASUREMENT 



Measurements from the specimens were made 

 with a binocular, stereoscopic microscope and a 

 micrometer eyepiece, except for the three mounted 

 specimens, whose measurements were made with 

 vernier calipers. Measurements of specimens less 



Figure 1. — Areas of capture of specimens (excluding Beebe's and 3 mounted specimens) indicated by circled dots, the 

 100-fathom curve by dotted lines, and the approximate axis of the Gulf Stream by arrows. 



