viii Elementary Biology. 



Tieghem, Goebel, De Bary, and Sachs in the former, and of 

 Huxley, Glaus, Balfour, and Gegenbaur in the latter will 

 supply him with references to such in plenty. 



Lastly, I am fully conscious of the risk I run in ven- 

 turing to add yet another text-book on Natural Science to 

 the long list already before the public; nevertheless the 

 absence of any text-book in the English language dealing 

 with the relationship of Botany to Zoology, and of both to 

 the fundamental sciences of Physics and Chemistry, en- 

 courages me to hope that this little book may fill a gap 

 left unoccupied by the classic treatises I have above re- 

 ferred to. 



R. J. HARVEY GIBSON. 



UNIVERSITY COLLEGE, LIVERPOOL : 

 October 31, 1 888. 



