Conjugatae, Desmidiaceae, Staurastrum. 1217 



apice furcatis annatis , sine aculeis circ. 44 a. diani. metieu- 

 tibus. 



Hab. in aquis turfosis et stagnantibus in Italia (Delponte), Gallia 

 (ijRKBissoN, Petit), Britannia (Ralfs, Hassall, Cooke), Germa- 

 nia (KuETZiNG, Rabeniiorst, Kirciiner), Hungaria (Istvanffi), 

 Hohemia (Hansgirg), Suecia (Cleve, Lundell), Norvegia (Nord- 

 stedt, Wille), Dania (Jacobsen), Nova Semlia (Wille), Spets- 

 bergia (Nordstedt), America boreali (Wolle), Nova Zelandia 

 Maskell). — Dimens. 45-48 ^; 35 (Kirchner); 36 ^; 54 (Delpon- 

 to); diam. 34-50 (j.. (Wolle). — Var. intermedium Wille Norg. 

 Fersk. p. 44, t. II, f. 29: radiis brevioribus, curvatis, incisura me- 

 <liana profunda, triangulata, aculeis plerisque non furcatis; semi- 

 cellulis a vertice visis 4-radiatis, radiis curvatis. Ad u Haaboel » 

 Norvegia3. — Dimens. 27 s 25; diam. max. 33 u..; lat. isthmi 10,5 [j.. 



— Var. depauperatum Wille Ferskvandsalger fra Novaja Semlja 

 p. 55, t. XIII, f. 69: trigonum ; semicellulis a vertice visis lateribus 

 fere rectis ; membrana non aculeata sed subtiliter granulata. Ad 

 (( Mollerbay » Novoe Semlise. — Dircens. 48 =: 48 ; lat. isthm. 20 p.. — 

 Var. ornatum Nordst. Desm. Spetsberg. p. 40, t. 7, f. 27, Hedwi- 

 gia 1874, p. 40: semiceliulis ad basim serie transversali aculeo- 

 rum ornatis, proininentiis radiorum simplicibus, subulatis, ceteris 

 fere oranibus fixis. In insulis spetsbergensibus. — Dimens. 45-48 ^ 

 35; lat. isthm. 14 a. — Forma spinosissimum Wille Ferskvands- 

 alger fra Novaja Semlja p. 54, t. XIII, f. 67-68: processibus cel- 

 lularum brevioribus, aculeis plerumque bidentatis, semicellulis non- 

 numquam aUernantibus, — Forma trigonum Wille 1. c. p. 55: di- 

 mens. 40 i; 40 ; lat. isthm. 19 p.. Ad (( Mollerbay )) Novae Semlia). 



— Forma tetragonum Wille 1. c. p. 55, t. XIII, f. 67: dimens. 

 38-40 =; 40, lat. lateris 30 p.., long. spin. 3,5 [j. Ad (( Matotchkin 

 V. Del )) Novse Semlia). — Forma pentagonum Wille 1. c. p. 55, t. 

 Xni, f. 68; dimens. 50^50, lat. isthm. 26 p.., long. spin. 2,5 [j.. 

 Ad (( Matoschkin v, Del )) Novse Semlia). — Forma simpiex Boldt 

 Studier p. 26, t. II, f. 49, Notarisia 1888, p. 603: forma a ver- 

 lice visa tetragona, aculeis simplicibus, non bifidis, lateribus late 

 concavis. Ad (( S. Julianehaab )) in Groenlandia. — Formae spinosis- 

 simcv ieiragoncv Wille proxima. Dimens. 38 =; 40,8, lat. isthmi 15 [j.. 



— Forma intermedium Wille Ferskvandsalger fra Novaja Semlja 

 p. 44, t. XIII, f. 39: radiis brevioribus curvatis, incisura mediana 

 profunda, triangulata, ac,uleis plerisque non furcatis; semicellulis 

 a vertice visis 4-radiatis, radiis curvatis. Ad (( Haabol. )). — Dimens. 



77 



