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^4 



PLATE IX. Induction of a lens, (a) Lens induction (L,. ind.) in the belly 

 epidermis of Triton taeniatus by an implanted eye-cup (Au. impl.) of T. 

 alpestris, after Mangold, (b) The eye-cup of T. taeniatus has induced a lens 

 in transplanted ectoderm from T. cristatus (left). This lens is larger than 

 a normal taeniatus lens (right), (c) The eye-cup of T. cristatus has induced 

 a lens in transplanted ectoderm from T. taeniatus (left). This lens is smaller 

 than a normal cristatus lens (right), (b-c) after Rotmann. 



