46 Karl E. Hlrn. 



Oe. Petri (Monogr. p. 154). 

 Hah. in 

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



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



Hah. in 



America bor.: in aqua stagnanti, Ithaca, N. Y. (Herb. Atkiuson). (»erniania : ad Bis- 

 perode prope il. Weser (sec. S u h r p. 259). 



Exemplaria in America collecta magnitudinem habent : 



crassit. cell, veget 18—24 n , altit. 2V2 — 4-plo major; 



„ oogon 35—40 „, „ 40 -53 f< ; 



oospor. . . : . . .33-39 „, „ 35-43 „. 



Oe. platygynum (Monogr. p. 276). 



Hah. in 



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

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

 Angliœ (sec. West [I] p. 15); Orkney Islands, prope Kirkwall Scotise (sec. West [VII] p. 11). 

 Dania : in insulis Fœroënsibus, Sandö, Grothusvatn (sec. Hallas in B r g e s e n [I] p. 335 

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

 West [IV] p. 12). 



Oe. plusiosporum (Monogr. p. 84). 



Hah. in 



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



Oe. pluviale (Monogr. p. 280). 



Exs. 1904 in Phycoth. Bor.- Amer. Fasc. XXIV, N:o 1190. 



Hab. in 



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

 Cal. (Herb. Gard ner. Misit cl. Fr. Collins). Asia: in insula Koh Chang civit. Siam Indise 

 Orientalis (sec. West [II] p. 76). Austria: Tusset Bohemite (sec. Pascher mscr.). 



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



Tom. XXXIV. 



