ELECTROPHYSIOLOGICAL STUDIES OF CHEMORECEPTION 



IN ELASMOBRANCHS 



EDWARD S. HODGSON 

 Department of Biology, Tufts University, Med ford, Massachusetts 02155 



ROBERT F. MATHEWSON 

 Tice Biological Research Laboratory, P.O. Box 5387, Tice, Florida 33905 





85g« 





Dr. E. S. Hodgson filming shark behavior from elevated obser- 

 vation platform (upper photo); Dr. R. F. Mathewson prepares 

 to attach blinker light to lemon shark (lower photo). 



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