metamorphosis of amphibians: frog and axolotl, wood engravings, published ca.1890 - salamander eggs stock illustrationsMetamorphosis of amphibians: Frog and Axolotl, wood engravings, published ca.1890
reptiles and amphibians, chromolithograph, published in 1891 - salamander eggs stock illustrationsReptiles and amphibians, chromolithograph, published in 1891Snake, Crocodile, Turtle
