CHAPTER THREE 



Sharks 



BY 

 HENRY B. BIGELOW and WILLIAM C. SCHROEDER 



ACKNOWLEDGMENTS 



In preparing the present paper we have received invaluable assistance and co-operation 

 from many people, both here and abroad. Numerous correspondents have contributed 

 information of various sorts, including photographs of freshly caught specimens, and 

 these are noted under the accounts of the respective species. We are particularly grate- 

 ful to Luis Howell-Rivero and Stewart Springer for contributing much-needed speci- 

 mens, together with extensive notes on the occurrence of many species from Cuba and 

 Florida. We wish also to express our gratitude to the following persons: J. L. 

 Baughman for an extensive series of specimens from Texas; Maj. C. M. Duke, 

 U.S. Army, for a specimen of the fresh-water Shark from Lake Nicaragua, and 

 F. B. Richardson for arranging its transportation; Capt. James Whaley for sending 

 us a "Mako" taken off Ocean City, Maryland; Richard Foster and John Huntington 

 for a "Mako" from Cat Cay; T)r. Heloisa Alberto Torres for entrusting to us the 

 type specimen of Scyliorhinus haeckelii (Ribeiro) for study; Lieut. -Commander 

 J. W. Lowes, U. S.N. R., for records of his own captures (s/' Carcharodon, together 

 with color notes, measurements and photographs; President Don Anastasio Somozo 

 of Nicaragua, Capt. W. B. Brinker and Frank Fisher of the National Geo- 

 graphic Society for photographs of newly caught specimens of the fresh-water Shark 

 of Lake Nicaragua; Carlos de la Torre for permitting us to have photographs taken 

 of the late Filipe Poey's unpublished drawings of Cuban sharks, with copies of Poey s 

 unpublished notes; A. Fraser Brunner and Lieut. Colonel W. P. C. Tenison for 

 drawings o/" Pseudotriakis and Echinorhinusyrow specimens in the British Museum, 

 and Miss Ethel wynn Trewavas who enlisted their kind assistance; W. H. Rich 

 for records of recent captures of the Greenland Shark by Gulf of Maine fisher- 



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