638 
BULLETIN OF THE BUEEAU OF FISHERIES 
yet no indication that one of them (the left one) will “migrate.” Pigmentation has 
increased greatly, and is equally developed on both sides. 
Young fish 26 days old . — Growth among the five fish alive at the age of 26 days 
was quite unequal. In the larger ones, 3.8 mm long when alive, rays are quite fully 
Figure 156 . — Achirus fasciatus. From a young fish 17 days old. 
Figure 157 .— Achirus fasciatus. From a young fish 32 days old. 
Figure 158 .— Achirus fasciatus. From a young fish 34 days old. Though only a few days older than the one illustrated in fig. 157, 
development is much further advanced. 
