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8) Hoog. 



9) Wenham. 



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12) Griffith. 



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14) Wells. The structure of Eu- 

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16) Stephenson. Observation of 

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17) Hunt. 



18) Schiff. 



19) Naegeli u. Kramer. Pflanzen- 

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 the structure of Diatoms. 



23) A. Schmidt. Atlas der Diato- 

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26; Kitton. Critical remarks. 



Journal of microscopic Society 

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Sill. Journal vol. II. 

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Proceedings of Roy. Society 1853. 



Monthley microscopic Journ. 

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Ebenda vol. VIII. 72. 

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Journal of microscopic science. 

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Monthley microscopic journ. XV. 



Joh. Müller's Archiv für Anatomie 

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Quart, microsc. Journ. XI. p. 63. 



