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[221]

"Die Kalkschwämme," 1871.

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Dendy. loc. cit. p. 159.

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Quart. Journ. Micr. Sci. xxxvi. 1894, p. 127.

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Doederlein, Zool. Jahrb. Abth. Anat. x. 1896, p. 15, pl. ii. and iii.