Foraminifera from the Upper Lias of Byfield, Northamptonshire

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Abstract
Summary: The paper, which for the most part is a systematic description of the foraminifera, is an attempt to unravel the somewhat complicated taxonomy of the species present. The foraminiferal fauna is unlike that of the preceding Lower and Middle Lias, being typically Upper Lias in appearance, except for several long-range species. In the chapter on systematics the variation of several species is dealt with. On the whole, the foraminifera are very variable and some abnormal specimens occur.

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