Using twenty species of marine teleosts, histological observations were made on the interstitial tissue of kidney to examine amount and distribution of yellow and dark brown pigment granules detectable in the tissue. The results obtained are as follows. In nine species such as Japanese parrot fish and kelp-bass, the pigment granules were detected as small deposits in the nterstitial tissue, whereas in eleven species such as Japanese horse mackerel and yellowtail, the granules were observed as comparatively large aggregation in the tissue. In both cases the following three types were distinguished on pigment composition. In the first type the pigment deposition was made up only of yellow pigment granules, in the second the deposition consisted of yellow and dark brown pigment granules, and in the third type the pigment aggregation was composed only of the latter pigment granules.