- 55 - given in NAS-NRC Publication 655. The value of the information in Table IV is limited by the amount and the reliability of the data. The lack of information on the presence of elements of fission preducts, in a compilation by Vinogradov (1953) of data on the chemical composition of fish, is a good indication that little work has been done on these elements. Fukai and Meinke (1959) in a more recent publication, have reviewed the literature for data relative to the occurrence of trace elements in sea water and marine organisms including the soft parts of fishes. The information about trace elements in fish was either meager, reliability, or nonexistent. of questionable For marine plankton, valuable information about trace elements in ten species of marine zooplankton, based upon spectrographic analyses, published by Nicholls, Curl and Bowen (1959). beginning studies by Nicholls et al., has been From these it now appears that, "...for any given chemical element there will eventually be found at least one plankton species capable of spectacu- larly concentrating it." This is of significance to the consideration of trace elements in fish because many plankton organisms are preyed upon by fishes and therefore fish may have available to them trace elements in a concentrated