The part four of this article contains descriptions of life colors of the species nos. 59-76, with some interesting notes on the fishes found in Suruga Bay and others. The interesting species are as follows: Arengus sagax with notes on the variations of spottings on the body; characteristics of Parasalanx ariakensis from N. Kyushu; variations of members of anal organs found in eleven species of the Lantern-fishes of Suruga Bay; life color of the sea-run form of Triborodon hakonensis.
