•252 



and larva from material treated at the Piel 

 Hatchery. The average temperature of the 

 water in the hatching hoxes during the 

 developmental period was 7° C. 



rig. 36. Larval Plaice at the beginning of the metamor- 

 phosis. The yolk-sac has been absorbed, and 

 the larva is beginning to feed. Xote the 

 beginning of the asymmetry — the left eye is 

 more dorsal than the right. Xote also the 

 upturned end of the notochord. Xat. size 

 = 15 mm. X G. (After Ehrenbaum, Eier 

 und Larven von Fischen der Deutscheu 

 Buclit. Wiss. Meeresuntersueh. Kiel. Komm. 

 Bd. 2, Heft I., Abth. I., Plate 4, fig. 15. 

 1896.) 



Fig. 37. First bottom stage of the Plaice. The 

 metamorphosis is completed. Xote the 

 relatively large size of the eyes and the small 

 paired fins. x 4^. Xat. length = 13 mm. 

 (After Petersen, 4th Rep. Danish Biological 

 Station. PL L, fig. 10. 1893.) 



C. TlNLING & Co., PjUNTKKS, 53, ViCTOKIA SlIiKKT, LlVKliroOL. 



