II.—The Mesozoic and Cenozoic Echinodermata of the United States. By W. B. Clark and M. W. Twitchell. Washington, U.S. Geological Survey, vol. liv, 1915. 4to. pp. 3401, with 108 plates.

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II.—The Mesozoic and Cenozoic Echinodermata of the United States. By W. B. Clark and M. W. Twitchell. Washington, U.S. Geological Survey, vol. liv, 1915. 4to. pp. 3401, with 108 plates.

Volume 3, Issue 6
H. L. H.
DOI: https://doi.org/10.1017/S0016756800201374

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II.—The Mesozoic and Cenozoic Echinodermata of the United States. By W. B. Clark and M. W. Twitchell. Washington, U.S. Geological Survey, vol. liv, 1915. 4to. pp. 3401, with 108 plates.

Volume 3, Issue 6
H. L. H.
DOI: https://doi.org/10.1017/S0016756800201374

To save this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you used this feature, you will be asked to authorise Cambridge Core to connect with your Google Drive account. Find out more about saving content to Google Drive.

II.—The Mesozoic and Cenozoic Echinodermata of the United States. By W. B. Clark and M. W. Twitchell. Washington, U.S. Geological Survey, vol. liv, 1915. 4to. pp. 3401, with 108 plates.

Volume 3, Issue 6
H. L. H.
DOI: https://doi.org/10.1017/S0016756800201374

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II.—The Mesozoic and Cenozoic Echinodermata of the United States. By W. B. Clark and M. W. Twitchell. Washington, U.S. Geological Survey, vol. liv, 1915. 4to. pp. 3401, with 108 plates.

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