抄録
In the previous paper the author reported riboflavin is extremely rich in the kidney of marlins. Murayama and Randoin have found abundance of riboflavin in the kidney of pink salmon and beef, amounting 11.8 and 10.0mg per cent on fresh basis, respectively. The author's data on marlin kidney, however, showed far richer in riboflavin amounting thirty times, at the maximum, as much as the above animals. Analytical test, paper chromatography, absorption spectra and fluorescent spectra have confirmed that the so-called riboflavin in the marlin kidney to be identical with the true riboflavin.