us 



frond (the axis is indistinct in surface- view), -y. Fig. 6 : frond 

 bearing tetfasporic sori, from Povorochini (Russian coast? 31, Aug.), 

 ]. Fig. 7-8-' portion of the same, ca. |. Fig. 9: cross-section 

 of a tclrasporic sorus, ". Fig. 10 : portion of the same, "-. 



Delesseria Lamouroux, 1813. 

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