YOUNG: VERTICAL DISTRIBUTION AND PHOTOSENSITIVE VESICLES 



cephalopods taken by the IKMT came from a sam- 

 pling program by T. A. Clarke, University of 

 Hawaii. I thank J. Walters and S. Maynard for 

 their comments on the manuscript. This study was 

 supported by grants GB 20993 and GA 33659 from 

 the National Science Foundation. Hawaii Insti- 

 tute of Geophysics Contribution No. 916. 



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615 



