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un petit microscope - Biblioteca Digital de Obras Raras e Especiais ...

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LES ALGUES 113<br />

plus épaisse, et les filaments sont interrompus par<br />

<strong>de</strong> grosses cellules mortes (Planche X, 31).<br />

Nostoc. — Les Nostocs forment <strong>de</strong>s boules<br />

gélatineuses sur la terre humi<strong>de</strong>. A l'intérieur, il<br />

y a <strong>de</strong>s chapelets <strong>de</strong> cellules enroulés les <strong>un</strong>s sur<br />

les autres et interrompus par <strong>de</strong> grosses cellules<br />

mortes (Planche X, 32).<br />

H

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