1186 ConjugataB, Desmidiacete, 5taurastrum. 



tarisia 1886, p. (30. — Parvuiii, glabrum, circitei' dimidio diametro 

 loiigius, sinu profuudo; augulis aoutis, valde ampliatis ; semiceliulis 

 ovatis vel subpyrainidatis, diametro brevioribus, basi ampliata, an- 

 gulis inferioribus rotundatis, lateribus convexis, apice rotundatis; 

 a vertice visis triangularibus, augulis late rotundatis, lateribus le- 

 niter convexis vel rectis. 



Hab. ad «Green's Lake» New Jersey Araericae bor. (Wolle). 



— Dimens. 45::; 31. Staurasti^^o cordato Gay valde proxima est 

 hcec species. 



135. Staurastrum polonicum Racib. Desm. Okol. Krak. p. 17, n. 128, 2863 

 t. 1, f. 10, Desm. polon. p. 29. — Mediocre, oblongum, longius 

 quam latius, non profunde constrictum, sinu obtusangulo; semicel- 

 lulis hexagoniis, paullo latioribus quam longioribus, a basi admodum 

 lata ad medium dilatatis, dorso truncatis, lateribus inferioribus 

 subrectis, superioribus concavis, angulis rotundatis granulatis; a 

 vertice visis 8-goniis, lateribus rotundato-concavis, angulis rotun- 

 datis, granulatis; dorso a vertice viso hexagono, angulis granula- 



tis, lateribus concavis ; angulis omnibus verrucis obtusis centraliter 



ordinatis ornatis, membrana cetera levi; chlorophoris ?. 



Hab. prope «Kepnikan in uByczynan Poloniae (Raciborski). 



— Dimens. cell. 45 ^j 35, lat. apic. 21 a., lat. isthmi 20 a. Siaura- 

 slro mutilaio Lund. proximum. 



136. Staurastrum friburgense Millard. Germ. d. Zygosp. p. 40, t. 17-28, 2864 

 Wille Norges Fersk. pag. 43. — Inter Siaurasirwn ?nuiwum et 



St. punctulaium medium, paullo magis longius quam latius; zy- 

 gotis rotundatis, 45-50 u.. diam., saturate brunneis, spinis duplo 

 longioribus, bifurcatis, basi cavis, apice farctis obsitis; membrana 

 3-stratosa, episporio hyalino, mesosporio brunneo, foveolato, endo- 

 sporio tenuiori hyalino, jodi ope haud co^rulescentibus. 



Hab. in ampulla in instituto botanico ad Friburgum (A. MiL- 

 LARDET); ad ((Haaboeb) in Norvegia (Wille). — Dimens. cell. 

 42=^33, lat. isthmi 14 a. 



137. Staurastrum baciiiare Breb. in Menegh. Syn. Desm. 1840, p. 228, 2865 

 Liste p. 145, Ralfs Brit. Desmid. p. 214, t. XXXV, f. 21, Rabenh. 



FI. Eur. Algar. III, p. 201, Binaiella baciilaris Breb. Alg. Falai- 

 se p. 66, Phycastrum bacillare Kuetz. Spec. pag. 181. — Leve, 

 22-25 a. diam,, profunde constrictura, sinu acute rectangulari ; se- 

 micellulis anguste lanceolatis, extrorsum arcuatis, utroque fine ca- 

 pitato-incrassatis, in medio processu capitato instrnctis, a vertice 



