REGENERATION 



689 



Regenerative capacity has been limited in the salamanders so that 

 while the whole will regenerate certain lost parts, the lost part 

 even under favorable circumstances is incapable of regenerating the 

 whole body. A tail cut off and transplanted to the back, and proper 

 circulation established to insure good nutrition, will regenerate an- 

 other tail if a proper wound is made, but it will not regenerate a 

 new body. 





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Fig. 368. — Regeneration of the lens of the eye from the iris in Triton. (After 

 Wolff.) A, edge of iris with beginning of lens; B, C, later stages; D, still later 

 stage, showing rounded formation of lens structure ; E, entire eye with regenerat- 

 ing lens. (From Morgan, Regeneration, published by The Macmillan Company.) 



Regeneration of the lens of the eye from the edge of the iris in 

 Triton is a different feature in regeneration. Here the new structure 

 comes from an entirely different germ layer. 



