46 Karl E. Hlrn. 



Oe. Petri (Monogr. p 154). 



Hab. in 



Asia: in insula Ceylon Indite Orient, (sec. West [III] p. 127). 



Oe. plagiostomum ß gracilius (Monogr. p. 101). 



Hab. in 



America bor.: in aqua stagnanti, Ithaca, N. Y. (Herb. Atkinson). Germania: ad Bis- 

 perode prope fl. Weser (sec. Suhr p. 259). 



Exemplaria in America collecta magnitudinem habent : 



crassit. cell, veget 18 — 24 n , altit. 2'/ 2 — 4-plo major; 



,, oogon 35—40 „, „ 40 -53 (i ; 



oospor 33-39 „, „ 35—43 „. 



Oe. platygynum (Monogr. p. 276). 



Hab. in 



Africa: in insulis Azorensibus, San Miguel (Boblin p. 49). Asia: in insula Ceylon 

 Ind. Orient, (sec. West [III] p. 127). Britannia : Yorkshire, Pilnioor et Eiccall Common 

 Anglise (sec. West [I] p. 15); Orkney Islands, prope Kirk wall Scotise (sec. West [VII] p. 11). 

 Dania : j in insulis Fseroensibus, Sandö, Grothusvatn (sec. Hallas in Borge sen [I] p. 335 

 et [II] p. 249). Germania: Lüneburger Heide (Schmidt p. 66). Hibernia : Donegal (sec. 

 West [IV] p. 12). 



Oe. plllSiosporum (Monogr. p. 84). 



Hab. in 



Fennia: Sb. Pielavesi (Silfvenius p. 12). 



Oe. pluviale (Monogr. p. 280). 



ExsM90i in Phycoth. Bor.-Amer. Fase. XXIV, N:o 1190. 



Hab. in 



America bor.; Golden Gate Park, San Francisco, Cal. (Phykoth. Bor.-Amer.) ; Berkeley, 

 Cal. (Herb. Gardner. Misit cl. Fr. C o 1 li n s). Asia : in insula Koh Chang civit. Siam Indise 

 orientalis (sec"; West [II] p. 76). Anstria: Tusset Bohemise (sec. Pascher mscr.). 



Magnitudinem habent exemplaria in Koh Chang collecta, sec. West: 



