The fine structure of the frustule ofMelosira variansC. A. Agardh

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Abstract
The valves and girdle bands of Melosira varians C. A. Agardh have been shown to possess greater detail than had been supposed from light microscopy. Spines, pores and projections on the surface of the loculate valve are described, and the precise relationships of the girdle bands to each other and to the valves have been elucidated.