4.18 Bioaccumulation Values for Tributyltin in Fish. IV -40 



4.19 Bioacxxmulation Values for Tributyltin in Molluscs. IV -41 



4.20 Environmental Concentrations of Organotin Compounds in U.S. 

 Waters. IV -45 



4.21 Comparison of Units Used in the Organotin Literature. IV -50 



