Fig ure Page 



i2„ Fractionation of an alcohol extract of bigeye 



flesh: procedure and results in experiments 



Nos„ 26-1, 262, 266 to 269. 272, and 277 49 



13. Fractionation of a first alcohol extract of bigeye 



flesh: procedure and results in experinnents 



Nos. 273 to 276, and 278.. 51 



14. Fractionation of a second alcohol extract of 



bigeye flesh: procedure and results in 



experiments NoSc 280 to 283 52 



15. Fractionation of a third alcohol extract of 



bigeye flesh: procedure and results in 



experiments NoSo 285 to 287, 54 



16. Fractionation of a second alcohol extract of 



bigeye flesh: procedure and results in 



experiments NoSo 298 to 303 . , 56 



17. Diagram of mechanical device for lowering 



lures into water: AB - crosspiece; LL' ~ 



lures; U - supporting post; F - fulcrum; 



C - notch; P - plate to cover notch; W - 



weight; C - cord ......,, 64 



1 8„ Diagram of transcribing^recording device: A - 

 lever operated by toggle switch (E) for re- 

 cording "passes"; B - lever operated by 

 dial (D) for recording nuinber of fish in area; 

 C - timer; F - kymograph „ 66 



19o Typical kymograms: A - under control conditions; 

 B - when stinnulated by lures; C - when 

 stimulated by lures plus extract 68 



Fronti8piece--Tuna Study Pond at Coconut Island, Oahu 



