INTRODUCTION xiii 



The Crayfish : An Introduction to the Study of Zoology (1880). 

 Science and Culture (1881). 



A Course of Practical Instruction in Elementary Biology (1881). 

 The Origin of the Existing Forms of Animal Life (1883). 

 Essays on some Controverted Questions (1892). 

 Evolution and Ethics (1893). 



(A complete bibliography of Huxley's works is given in the second 

 volume, pp. 480-498, of The Life and Letters of Huxley, 1900.) 



BOOKS FOR REFERENCE 



Huxley's Life and Letters, 1900. 

 Green's Short History of the English People. 

 Montgomery's Leading Facts of English History. 

 Smalley's Huxley, in Scribner's Magazine, October, 1895. 

 Fiske's Essays Historical and Literary (Vol II, Ch. VI). 

 Clodd's Thomas Henry Huxley. 

 ' Huxley's Aphorisms and Reflections. 

 Darwin's Life and Letters. 



