98 ANIMAL LIFE 
with small heads and very loose texture of the tissues, the 
body substance being jelly-like and transparent. As the fish 
grows older the body becomes more compact, and therefore 
Fig, 49.—Stages in the post-embryonic development of the lady-fish (Albwla vulpes), 
showing metamorphosis. —After C. H. GILBERT. 
shorter and slimmer. After shrinking to the texture of an 
ordinary fish, its growth in size begins normally, although 
