Carpenter, William Benjamin, 1813-1885 · London : John Churchill · leaf 348
zx ^rs^ … ^^ I/icmopTioraflaheUata. their surfaces, or may be occasioned by the persistence of theconnecting membrane of the valves, after the completion ofthe seK-division of the frustules. To the former divisionbelong several genera, the form of whose frustules is more orless elongated, so that the…
Microscopy
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