1114 Conjugatse, Desrnidiaceto, Micrasterias. 



193, t. XII, f. III, Focke Phys. Stud. I, p. 45, n. 13, t. I, f. 13. — 

 Magaa, in medio tumido constricta, utroque polo rotundata et api- 

 culata; semicellulis subquinquelobis, divergentibus, a latere fusi- 

 formibus, lobis basalibus, apice sinuato-bidentatis; lobo polari ex- 

 serto, e basi lata sursum dilatato, in dorso late sinuato, angulis 

 lateralibus sinuato-bidentatis; membrana levi. 



Hab. in stagnis in Italia (Delponte, Meneghini, De-Toni, 

 Levi), Gallia (Brebisson, Petit), Germania (Rabenhorst, Kir- 

 chner), Bohemia (Hora, Hansgirg), Dania (Jacobsen), Suecia 

 (Cleve, Lundell, Wittrock), Hungaria (Istvanpfi), Sibiria 

 (Ooldt), Fennia (Elfving), America boreali (Wolle), Birmania 

 (Joshua), Japonia (Roy, Bisset). — Dimens. cell. 100-130:^98-125. 

 — Var, superflua Turn. Journ. Royal Micr. Society 1885 De- 

 cemb. ser. II, vol. V, p. 936, tab. XV, f. 1 1 ; a forma typica differt 

 prfi3cipue lobulis hinc illinc trifidis. Ad a Bowness, Winderraere » 

 Anglia3 (W. B. Turner). — Dim. 116^102, lat. isthm. 17 ^. 



10. Micrasterias furcata Ag. in Flora 1827, p. 643, Ralfs Brit. Desm. 

 p. 73, t. 9, f. 2, Wolle Desm. U. S, p. 111, t. 35, f. 5-6, Kirchn. 

 Alg. Schles. p. 162, Cooke Brit, Desm. p. 55, t. 21, f. 1, Hansg. 

 Prodr. p. 208, Micrasierias Crux-melitensis var. furcaia Ra- 

 benh. FI. Eur. Algar. III, p. 190, Micrasierias radiata Hassall 

 Br. Fr. Alg. p. 386, Micrasterias meliiensis Ralfs in Ano. Nat. 

 Hist. XIV, t. 6, f. 2, Micrasterias meliiensis var. gracilis Kuetz. 

 Sp. p. 171. — Levis, 140-220 s 113-205, circiter 35 jj.. crassa, isthmo 

 12-22 p. lato; semiceliulis subquinquelobis, lobis basalibus et in- 

 termediis bifidis, laciniis eorum gracilibus, linearibus, divergenti- 

 bus, ad apices furcatis, lobulis plerumque incurvis, lobo polari 

 exserto, sinu rotundato emarginato, angulis lateraliter productis 

 apiceque furcato-subforcipatis. 



Ilab. in aquis stagnantibus turfosisque in Italia (De-Toni), 

 Britannia (Cooke, Hassall, Ralfs), Bohemia (Agardh), Germa- 

 nia (Rabenhorst, Kirchner), Gallia (Brebisson, Petit), Suecia 

 (Cleve, Lundell), Norvegia (Nordstedt), Fennia (Elfving), America 

 boreali (WooD, Wolle), Brasilia (Wille). ~ Var.? simplex Wolle 

 Freshw. U. S. p. 40, t. 59, f. 6-7 : cellulis feque longis ac latis 

 h. e. 140-150-140-150, biiobis; lobo terrainali exerto segraentis- 

 que patentibus; lobis lateralibus pleruraque simplicibus, subinde in 

 segraonta 2 angusta linearia divergentia apice furcata fissis. Ad 

 (( Winter Park » in Florida Araoricae borealis (H. D. Kitchel, 

 Wolle). — Var. decurta Turn. J. R. M. S. 1885, p. 926, tab. XVI, 



