FIG. 4. Development of the egg of Salmo irideus; at each stage a lateral view of the
whole egg, and the isolated blastoderm are shown (from Pasteéis, 1936).
A: blástula; Β: advanced gastrula; C: young neurula; D: epiboly 1/4; Ε: epiboly 1 /2;
F: epiboly 3/4.