Inside and Outside View of Tadpole During Metamorphosis
The illustration is showing both inside and outside view of the tadpole. The left inside view shows the tadpole with two front legs, heart, intestines, and gills. The right image shows the tadpole with frog like features with forelegs, back legs, and a tail.
Keywordsfrog, frogs, tadpole, tadpoles, Inside and Outside View of Advanced Tadpole During Metamorphosis
Encyclopaedia Britannica (11th ed., vol. 18) (New York, NY: The Encyclopaedia Britannica Company, 1910)