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1886. On the Fresh- Water Invertebrates of the North American Jurassic. 

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1886. On the Relation of the Laramie Molluscan Fauna to that of the 

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1890. On the Biological and Geological Significance of Closely Similar 

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1895. The Bear River Formation and Its Characteristic Fauna. Bull. 



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1885. Report on the Invertebrata of the Laramie and Cretaceous Rocks of 

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1887. On Some Fossils from the Cretaceous and Laramie Rocks of the 

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1909. Paleogeographic Maps of North America. Journ. of Geol., XVII, 

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