THE ORIGIN OF THE EARTH 



By THOMAS C. CHAMBERLIN 



A new chapter in "the Story of the Birth of the Earth." 

 xii+272 pages, 8vo, cloth; $1.50 net, postpaid $1.65. 



One of "The University of Chicago Science Series" 



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A NEW SERIES— VOLUME II 



No. I. The Structure and Relationships of Diplocaulus. 

 With plates. By Herman Douthitt. 28 cents postpaid. 



No. 2. Labidosaurus Cope, a Lower Permian Cotylosaur 

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No. 3. The Phylogeny and Classification of Reptiles. 

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No. 4. (i) The Evolution of Vertebrae ; (2) The Osteology 

 of Some American Permian Vertebrates. III. By Samuel 

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TITLES IN VOLUME I 



No. I. The Vertebrates from the Permian Bone 

 Bed of Vermilion County, Illinois. With plates. 

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No. 2. Prodromites, A New Ammonite Genus 

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No. 3- Palaeontological Notes. With plates. 

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No. 4. New or Little-known Vertebrates from 

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No. 5. The Stokes Collection of Antarctic Fos- 

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No. 6. (i) The Osteology of the Skull of the 

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No. 8. The Osteology of Some American Per- 

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No. 9. (i) The Osteology of Some American 

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 No. 10. (i) Atactocrinus, a New Crinoid Genus 

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Vol. I, 274 pages, cloth; $2.50 [postpaid $2.70) 



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