72 Karl E. Hirn. 



Genus I. OEDOGONIUM Link. 

 1820 Link p. 5; 1858 Pringsheim (III) p. 68; 1874 Wittrock (IV) p. 6. 



Thallus aquaticus, e filis simplicibus constans; cellulse vegetativa? cylindra- 

 cese, parietibus longitudinalibus rectis, raro undulato-constrictis ; cellula basalis 

 basi lobata, saepe statumini affixa; cellula terminalis apice obtusa vel apiculata 

 vel in setam longam producta; plant se divisione cellularum omnium vegetativa- 

 rum crescentes; in prima zoosporse germinantis partitione ruptio meinbranse 

 annuliformis in parte fit cellulae latiore, ciliis carenti; oogonia divisione cellulte 

 vegetativa? siniplici oriantur. 



A. Monoica vel dioica, macrandria (p. 48). 



a. Porifera (p. 49). 

 «. Globospora (p. 49). 



1. Oe. cryptoporum Witte. 



1870 Wittrock (I) p. 119; 1874 Wittrock (IV) p. 7; 1877 Nordstedt (I) 

 p. 23; 1878 Kirchner (I) p. 52; 1889 De Toni (I) p. 33. 



Oe. rnonoicum, oogoniis singulis, subdepresse oboyiforini-globosis vel sub- 

 depresso-globosis, poro niediano apertis; oosporis subdepresso-globosis, oogonia 

 fere complentibus, membrana laevi; antheridiis 1 — 7-cellularibus, sparsis vel 

 non raro subhypo- vel subepigynis ; spermatozoidis singulis ; 



crassit. cell, veget. 7 — 10 <<, altit. 4 — 6-plo major; 



„ oogon. 23 — 28 „, „ 26 — 31 ;<; 



oospor. 22-27,,, „ (13— ) 19— 21 „; 



„ cell, antherid. 6 — 8 „. „ 7 — 11 „. 



Tab. I, Fig. 1. 



Hab. in 



Dania (sec. Wittrock). (?) Norvegia (sec. Wittrock. An forma typica?). 

 Sitecia : Bäh. in lacu Feringe sjö ad Yttene, in Gluppö ad Fjällbacka, Koön ad 

 oppidurn Marstrand, Bredmossen par. Eomelanda (sec. Nordstedt); Dal. ad Hällan 

 par. Gunnarsnäs (Heib. Wittrock). 



T. XXVU. 



