PLATE IV.

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Fig. 1. Section of growth showing the thinning of the
surface epithelium and rupture.

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Fig. 2. Section showing the branching of connective tissue
cells between two sporangia.

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Fig. 3. Section showing a sporangium with its well defined
capsule and immature sporangia by its side.

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No. 4.

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No. 5.

Figs. 4 and 5.—same as Fig. 3, highly magnified.