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Conjugatae, Desmidiaceii^, Staurastrum. 1173 



106. Staurastrum senticosum Delp. Specim. Desm. subalp. p. 147, t. ^m 

 X, f. 38-30. — Cellulis paulo magis latis quam longis, valde con- 

 strictis; semicellulis e vertice triungularibus, iateribus rectis, angu- 



lis obtusis, e latere oblongo-cylindraceis, lateribus rectiusculis, apice 

 rotundatis, margine aculois validis biseriatis inslructo ; isthmo fere 

 tertiam partem totius latitudinis a^quante; membrana spinis loii- 

 gis acutisque ornata. 



Hab. in lacu candiano Italia) borealis (.J. B. Delponte). — Di- 

 mens. 72 s 79. Inter Slauraslrum liirsutum et St. ieliferum ma- 

 dium locum tenet. 



107. Staurastrum saxonicum Bulnh. in Rabenh. Krypt. BMor. v. Sachs. ^^-^^^o 

 p. 196, Fl. Eur. Algar. III, p. 213, Hedwigia II, p. 5! t. II, f. 7, 

 (non exacte), Richter in Rabenh. Alg. n. 1940! c. icone, n. 182.5 

 [sub St. cchinatol], Nordst. Desm. spetsb. p. 40, Wille Fersk. Nov. 

 Seml. p. 54 non Reinsch ! — Magnum, paulo longius quam latius, 

 pra^ter semicellularum basin undique dense aculeatum ; aculeis e 

 basi lata cuspidatis, in series regulares ordinatis; sinu acutangulo, 

 isthmo 22 u. lato; semicellulis late ellipsoideis, subseraiorbicularibus, 

 basi fascia connexiva distincta, a vertice triangularibus, angulis ro- 

 tundatis, lateribus modo leviter concavis, modo paullum convexis. 



Hab. \n fossis ad «Grimma» in Saxonia (Bulnheim); ad aMa- 

 totchkin, Kostin Shar» Novae Semlia^ (Wille); in insulis spetsber- 

 gensibus et Beeren E, (Nordstedt), in Suecia, Norvegia, Lulea 

 Lappm. (La geriieim), Groenlandia ( Boldt ). — Dimens. 70-75 ^; 

 62-67 (Nordstedt), 72-80 := 58-70, long. spin. 4 p.. (Wille). — Var. 

 pentagonum Harvey in BuIl.Torrey botan. Club XV, 1888, p. 155-161: 

 minus, 62 a. diam., e vertice pentagonum, latoribus paullo conca- 

 vis vel rectis; ceterura ut in typo. A.d a Old Town» et circa «0- 

 rono » Americao borealis (Harvey). 



108. Staurastrum granuiatum Reinsch Contrib. Aig. Fung. p. 85, t. 2S36 

 17, f. 3. — Semicellulis a fronte late ovato-cordatis, apice et po- 



lis lateralibus rotundatis, incisura angustiore disjunctis, e vertice 

 conspectis trigoniis, lateribus subconvexis, angulis rotundatis; mem- 

 brana verruculis absque ordine dense positis exasperata. 



Ilab. in Franconia Germanise (Reinsch), — Dimens. 49 c^ 39. — 

 Var. Reinscllii Istv. in Notarisia 1886, p. 239: membrana tota gla- 

 bra. In turfosis prope ((Nameszto» Hungarinp (Istvanffi). — Dimens. 

 46:^34; latit. isthmi 8 a. 



