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1961. Cenozoic and Cretaceous echinoids from Trinidad and Venezuela. 



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1953. Echinides fossiles du Congo et de l'Angola. 2" partie. Description 

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1958. Stratigraphy and paleontology of the late Neogene strata of the 

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1962. Neogene biostratigraphy of the Charlotte Harbor area in southwest- 



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1961. The echinoid Mellita in the Pacific coast Cenozoic. Los Angeles 



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1960. The geologic history of Baja California and its marine faunas. Syst. 



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1825. An attempt to divide the Echinoida, or sea eggs, into natural families. 

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1887. Explorations of the west coast of Florida. Trans. Wagner Free Inst. 

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1955. The invertebrates, vol. 4: Echinodermata. The Coelomate Bilateria, 

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1922. Fossil Echini of the West Indies. Carnegie Inst. Washington Publ. 



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1957. Tertiary Echinoidea from British Somaliland. Journ. Paleont., 

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1962. Revision of the cassiduloid echinoids. Smithsonian Misc. Coll., vol. 



144, No. 3, 262 pp., 181 text figs., 44 pis. 



