Ti::achers' Leaflet. 



615 



Toad development in a single season (1903). 



1-lS, Changes and growth from April to November, 113. Development in 25 to 60 days. 



9-14, Different sizes, July 30. 1903. 15-18, Different sizes. October 21. 1903. 



10, 11. TIte same tadpole — 11 is 47 hours older than 10. 



12, 13. The same tadpole -13 is 47 hours older than 12. 



