BIOLOGY. 



DR. CHARLES LETOURNEAU. 



TRANSLATED BY 



WILLIAM MACCALL.- 



^ Pro Veritate.' 



WITH EIGHTY-THREE ILLUSTRATIOyS. 



LONDON : CHAPMAN AND HALL, 1D3, PICCADILLY. 



PHILADELPHIA ; J. B LIPPINCOTT AXU CO. 



1878. 



