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lhe summer ofl876, 599 ; — II. Descriptions ofnew species of Uniones and a new 
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brackish-water deposits of the Western portion of North America, 607 ; —IV. Com- 
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— Geological Society. The : Quarterly Journal of the —, t. XXXIII, 
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Denbigshire to Beds usually described as Permian, 10. 
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