PLATE III 
Fig. 7. Photograph illustrating successive stages in the reduction of the 
intestinal spiral coil in tadpoles during metamorphosis 
Fig. 8. Microphotograph (x165) from a transverse section of the small 
intestine of a tadpole in which the digestive tube had nearly reached its 
maximum length 
Fig. 9. Microphotograph (x165) from a transverse section of the small 
intestine of a tadpole in which approximately 50 per cent of the reduc- 
tion in the length of the digestive tube had taken place 
Fig. 19. Microphotograph (x165) from a transverse section of the small 
intestine of a tadpole in which the digestive tube had practically reached 
its minimum length during metamorphosis 
Fig. 11. Microphotograph (x165) from a transverse section of the small 
intestine of a young frog about the time feeding is resumed 
