156 



p. 134. G. monotaenium de By in Hedwigia I. p. 106. Babenh. 

 Alg. N. 539! Docidium? asperum Ealfs (non Breb.). Brit. Desmid. 

 p. 158. N. 7. T. XXVI. F. 6.). G. cellulis diametro 10— 20-plo longiori- 

 bus , cylindricis , utroque polo non constrictis , in morem Mougeotiae 

 conjunctis; cytiodermate muricato-aspero. v. v. 



Diam. V208 — Vioo"' = 0,00043 — 0,00047". 



Hab. in stagnis paludosis, aquis turfosis, in pluribus locis Saxoniae, 

 Borussiae ; prope Penzance in Anglia (J. Ralfs), ad Dublin in Hibernia 

 (Archer), ad Upsaliam in Suecia (Cleve), Jeziorki in Galicia (Schliephacke). 



G. Brebissonii de By. (Conj. p. 77. T. IV. F. 26 et 27. Docidium 

 asperum Breb. Liste p. 147. T. II. F. 33. Leptocystinema Portii 

 Archer 1. c). G. gracilius , angustius ; cellulis subfusiformibus, apicem 

 versus sensim angustatis, utroque polo dilatatis , truncatis , diametro 

 10 — 16-plo longioribus , laxe connexis , saepe singulis ; cytiodermate 

 granulato - asperulo ; cytioplasmate saepius irregulariter contracto. v. v. 



Diam. max. (plerumque) x jvio'" — 0,0002". 



Hab. in stagnis Saxoniae (L. R. , P. Richter), ad Friburgum Bris 

 goviense (de Bary) , prope Falaise in Gallia (de Brebisson) , ad Dublin 

 in Hibernia (Archer), ad Upsaliam in Suecia (Cleve). 



G. Kinahami (Leptocystinema Kinahami Archer 1. c. Ralfs in 

 Pritch. Inf. p. 722. T. III. F. 4.). G. valde elongatum (2 — 3 uncias 

 longum) , fragilissimum; cellulis gracilibus, saepe singulis , diametro 

 20 — 40-plo longioribus, exacte cylindricis, utroque polo abrupte truncatis; 

 cytiodermate laevi. v. ic. 



Diam. Vm'" = 0,00052". 



Hab. in stagnis prope Dublin in Hibernia. 



1/XXV. Oeilieillaria (Roussel) de By (1858); Cellulae 

 elongato - cylindricae, nec constrictae nec incisae, in filamenta praelonga 

 conjunctae. Laminae chlorophyllosae plures (3) parietales , sinistorsum 

 spirales, nonnunquam confluentes. 



Genus insigne Spirogyram quasi referens, transitum in Zygnemaceas 

 efficiens. 



G. spirotaenia de By. (Conj. p. 77. T. IV. F. 1—22. Archer in 

 Pritch. Inf. p. 721. T. III. F. 3. Gonatozygon spirotaenium dc By. in 

 Hedwigia I. p. 106.). G. cellulis cylindricis, diametro 10 — 20-plo 

 longioribus, utroque fine paululum dilatatis; cytiodermate verruculoso- 

 aspero. v. ic. 



Diam. V'i30 — Vioo'" = 0,00068 — 0,00089". 



Hab. in palude turfosa prope Francofurtum ad Moenum , ubi cl. 

 de Bary detexit. 





