Conjugatie, Desmidiaceae, Penium. 861 



fusuideis vel duplo conicis, 40-44 a. circ. latis (sec. Klebs 30-41 

 p..), diametro maximo 5 -G-plo longioribus, a medio \n apices sub- 

 truncato-rotundatos seusiin attenuatis ; chloroplioris saturate viri- 

 dibus, medio fascia transversa pallida interruptis: /.ygotis globosis, 

 46-5G a. (]., levibus. 



Ilab. in fossis, rupibus madidis, paludibus totius Euro[);D a 

 promontorio boreaii (( Nordcap » (De Frauenpelt)) in Europam au- 

 stralom dispersum; in Aragonia (Loscos), in Sardinia (MarcucCi), 

 Britannia (Ralfs, Cooke), Gallia (Petit), Italia (De-Notaris., Del- 

 ponte), Germania (Klebs etc), Dania (Jacobsen), Suecia (Cleve, 

 Lundell), Norvegia (Nordstedt), Rossia (Artari), Hungaria (Is- 

 tvanffi), Fennia (Elfving), Amer. bor. (WooD, Wolle), Brasilia 

 (Wille), Birmania (Joshua). 



20. Penium Naegelli Brcb. in IVitcb. p. Inf. 751, Rabenh. FI. Eur. Algar. "2075 

 III, p. 110, Nordst. Norg. Desm. p. 43, Petit List. Desm. Paris 



p. 27, Cooke Brit. Desm, p. 42, t. 16, f. 4, Nclrhim D/gihis Naeg. 

 Einz. Alg. p. 108, t. VI, D. — Cellulis lanceolatis, utroque polo 

 late truncatis, 45-50 a. latis diaraetro subqnadrnplo longioribus, 



Ilab. in fossis, paludibus, per Europam passim ad Turicum in 

 Helvetia(NAEGELi), pr. «Falaise» (Brebisson) Gallise aliisque locis, 

 ad uGoeteborgn in Suecia, ad ((Dahlen)> in Saxonia, pr. a Schdr- 

 fling)) in Austria super., ad lacum «Malch», pr. ((Jeziorki» in Ga- 

 licia (SCHLIEPHACKE) in Hibernia (Cooke). 



21. Penium Navicula Bn^b. Liste p. 146, se occorre t. II, f.37, Archer in 207ti 

 Pritch. Inf. p. 751, Cooke Brit. Desm. p. 42, t 16. f. 5, Wolle Desm. 



U. S. p. 36, t. 5, f. 16, Hansg. Prodr. p. 176, Closterium Lens 

 Jacobs. var. minor Jacobs. Aper(}u p. 168, Pe^iium closlerioides 

 b Navicula Klebs Preuss. Desm. p. 24, t. 111, Penium closterioi- 

 des Hantzsch in Rabenh. Alg. n. 1329 !, De-Not. Element. p. 68, n. 

 75, t. Vlll, f. 77, Penium Berginii Archer in Micr. Journ. 1859, 

 p. 139. — Minus, cellulis oblongo-ellipticis vel fusiformibus, navi- 

 culaceis, diaraetro 4-5-plo longioribus, 43-72 i^ 12-17, polos versus 

 sensira attenuatis, apicibus obtusis, subtruncatis; pyrenoidibus 1-2 

 in utraque semicellula, chlorophoro laete viridi, raedio fascia 

 transversa interrupto; zygotis subquadratis, conipressis, angulis 

 acutiusculis, 33-38^:38-43; locellis apicalibus, spha^ricis, corpu- 

 scula trepidantia foventibus. 



Hab. in fossis, lacunis, stagnis, haud frequens, in Anglia, Hi' 

 bernia, prope «Falaise» Galliie (Drebisson), Saxonia, Styria, Italia, 

 Boheraia, Suecia, Norvegia, Dania, Fennia, Belgio, Rossia, Hungaria, 



