THOMAS H. HUXLEY'S WORKS. 



Collected Essays. i2mo, cloth, $1.25 per volume. 

 Vol. i. Method and Results. 

 " 2. Darwiniana. 

 " 3. Science and Education. 

 " 4. Science and Hebrew Tradition. 

 " 5. Science and Christian Tradition. 

 " 6. Hume. 



" 7. Man's Place in Nature. 

 " 8. Discourses, Biological and Geological. 

 " g. Evolution and Ethics, and Other 

 Essays. 



The Crayfish : 



An Introduction to the Study of Zoology. 

 With 82 Illustrations. i2mo, cloth, $1.75. 



Manual of the Anatomy of Vertebrated 



Animals. Illustrated. 12010, cloth, $2.50. 



Manual of the Anatomy of Invertebrated 



Animals. Illustrated. 121110, cloth, $2.50. 



Physiography : 



An Introduction to the Study of Nature. With 

 Illustrations and Colored Plates. i2mo, cloth, $2.50. 



The Origin of Species; 



Or, The Causes of the Phenomena of Nature. 

 1 2 mo, cloth, $1.00. 



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