47 



country. As I have remarked in my paper I.e., the difference of the 

 present plant from the typical one, viz. Polyopes constrictus, seems 

 to consist in the more flattish and more frequent constrictions at 

 mostly shortish intervals of the latter. 



PL. LXIII. Fig-. 1-2 : fronds of Polyrfcs Polyidcoidcs Okam., 

 1 . Fio-. 3-4 : terminal portions bearing cystocarps, -\ . Fig. 5 : 

 terminal portion with tetrasporic sori, ]. Fig. 6: cross-section 

 through the tetrasporic sorus, - 2 '|. Fig. 7 : cross-section of a ter- 

 minal segment bearing cystocarps, Y- Fig. 8 : one of the cystocarps, 

 magd.; 1 ^ 5 . Fief. 9: portion of the cross-section magd., ? ^. Fig. 

 10: portion of the longitudinal section magd., 2 j. 



Polyopes J. Agardh 1849. 



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