p. 4

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...side, sometimes expanded at the junction with the branch and bearing a single cell at each extremity - Fenestrules 4 or 4 1/2 in the space of 3 lines longitudinally and 7 to 10 transversely in the same space.

Middle Silurian - Niagara Shale

Lockport & Rochester N.Y.

Wauwatosa Dr. F.H. Day

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