Acknowledgments 



In addition to Captain Young on the one 

 hand, and a very long list of correspond- 

 ents on the other— see addendum to the Bibliography— there are a 

 number of specialists who aided us in compiling this work in various 

 ways; and with especially outstanding generosity. We are grateful 

 for the opportunity to acknowledge this help and try to thank these 

 selfless helpers and friends by name. The authors wish to apologize to 

 many of the people who have given their help for not incorporating in 

 this volume all of the extensive material supplied. There are limitations to 

 what can be included in a "popular" volume on the Selachians— those 

 judged by the authors, and those imposed by the publisher in the light 

 of the market in which his promotions hope to realize a profit. 



Among scientists and others with whom we worked, we would espe- 

 cially single out: Dr. Percy Gilbert, Cornell University, Ithaca, N. Y.; 

 Dr. Leonard P. Schultz, Smithsonian Institution, Washington, D. C; Dr. 

 Stewart Springer, U.S. Fish and Wildlife Service; Dr. Henry B. Bigelow, 

 Harvard University, Cambridge, Mass.; Dr. Eugenie Clark, Cape Haze 

 Marine Laboratory, Sarasota, Fla.; Mr. L. R. Moresi, Ocean Leather Cor- 

 poration, Newark, N. J.; Mr. Charles E. Jackson, National Fisheries Insti- 

 tute, Washington, D. C; Mr. A. L. Allyn, Shark Chaser Chemical Com- 

 pany, San Pedro, Calif.; Mr. Riley H. Allen, the Honolulu Star Bulletin, 

 Honolulu, Hawaii; Mr. and Mrs. E. L. Anderson, Bakersfield, Calif.; Dr. 

 Paul Budker, Counseller Technique, Ministere de la France d'Outre Mer, 

 Paris, France; Miss Yvonne Fran9ois, Societe des Pecheries Coloniales 

 au Requin, Paris, France; Gilbert Dukan, M.D., Paris, France; Dr. E. 

 Bertelsen, Danmarks Fiskeri og Havunder0gelser, Charlottenlund, Den- 

 mark; Dr. Klaus Sunnanaa, Director of Fisheries, Bergen, Norway; Mr. 

 H. Ler0y, Ler0y Hallvaard, A.S., Bergen, Norway; Dr. Johannes Lund- 

 beck, Director, and Dr. Dietrich Sahrhage, Institute for Sea Fisheries, Ham- 

 burg, Germany; Dr. E. F. Akyuz, Fisheries Research Center, Istanbul, Tur- 

 key; Mr. Arthur Heighway, publisher. Fishing Neivs, London, England; 

 Mr. C. A. Wiard, Billingsgate and Leadenhall Market, London, England; 

 Dr. Errol White, British Museum (N. H.), London, England; Dr. Denys 

 Tucker, formerly British Museum (N. H.), London, England; Dr. Har- 

 rison Matthews, Zoological Society of London, England; Mr. J. Jangaard, 



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