Abstract
IN a letter on the eggs of the pilot-fish in NATURE of August 14, 1926, p. 228, Mr. K. H. Barnard also mentions the eggs of the sucker-fish (Echeneis naucrates) “which are apparently still undescribed”. During my researches on the eggs and larvae of East Indian fishes (cf. Treubia, vol. 2, p. 97; vol. 3, p. 38; vol. 5, p. 408; vol. 6, p. 297; vol. 8, p. 199; and vol. 9, p. 389), I also became acquainted with the pelagic eggs of the sucker-fish. They are very large, having a diameter of 2.5 mm. The yolk is colourless and fills up the egg membrane fairly well. It contains a small oil globule of a bright yellow colour, diameter 160 , and the developing embryo is yellow also, as a consequence of the presence of a large number of yellow pigment spots. Besides these yellow spots there are also black ones, especially on the head and behind the eyes. In due time I hope to give a figure of the egg in Treubia.
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