50 



2 ) v \ - J$ 7 fa -* > v ' * S p > 7C b Cryptonemia / M 1- -fc 

 ? v ;5r A' * / 3 yj. Agardh J / W ^ - K V r jit JI - M ^ ^ * 

 > v ^ fi- (?'J ^ ^" Po'y- ligulata, P. rigida, P. Phyllophra, P. decipiens ^ t* 

 P. elata \- %. |H ^7 b / ^ ^ P. constrictus b x^ ffi f% h / H a 5 =E Si 



= ;fc * ;" * / r y . - f/c 7- ^ - g =. ^ fl 7 $? fi h y r a 



-V 2 >v 1- 3 . 



^V LXIII il JS- 1-2 : Polyopes Polyideoides Okam., ^ ^ { p / fg, 1. 

 -3-4: * 7 fl * ^fig ' .h 5, i-~5 : H9 fl- flfi ^ ff 7 W ^ ^ g / 

 &. 1-6 : m ft m T- S ^ ff if ffi, 2 f--7 :3i*7fi J A'S|5/ 

 ^ if M, --8 : *, M- ? --9 : il / ^ if M / - ST), 3< i .-10 : g / M 



Hyalosiphonia n. gen. 



DUMONTIACEAE. 

 PL, LXIV-LXV. 



Fronds filiform, cylindrical, branching on all sides, at the begin- 

 ning provided with a hyaline longitudinal, cylindrical axis, from which 

 infra-cortical cells verticillately arise longitudinally, the latter by further 

 division giving rise to the cortical layer which is composed of a few 

 rows of smaller cells arranged in an anticlinal manner. In older 



O 



portion, infra-cortical cells now abundantly formed, grow up into 

 elongated hyaline cells of wider and narrower calibres taking the 

 appearence of cylindrical cells and rhizoidal filaments, and the central 

 axis becomes indistinct being mixed up with them. Apical cells are 



