1176 Conjugatae, Desmidiacese, Staurastrum. 



sernicellulis ellipticis vel subglobosis, promineutiis G bifurcatis mil- 

 nitis, e vertice visis trigoniis, angulis in apice truncato vel sinua- 

 to bi-cuspidatis (li. e. processibus bifurcatis a fronte visis), sub 

 apice processibus geminis bifurcatis pra^ditis; merabrana punctulata. 

 Hab. ad « Lagoa Santa » in Brasilia Americae australis (War- 

 ming). — Long. s. proc. 17 p.., c. proc. 26 p.., lat. s. proc. 13 a., 

 c. proc. 25 p., constr. 7,7 a. 



114. Staurastrum mutilatum Lund. Desm. Suec. p. 74, t. 5, f. 3. — 2842 

 Mediocre, diametro circiter tertia parte loiigius, non profunde con- 

 strictum, sinu obtusangulo; semicellulis subhexagoniis, e basi ad- 

 modum lata ad medium dilatatis, dorso truncatis vel subconvexis, 

 lateribus et superioribus et inferioribus subrectis, utroque fine ob- 

 tusangulis, verrucis denticulatis secus series transversas, basalera 



et medianam, dispositis, supra medium sparsis ornatis ; a vertice 

 visis orbiculari-4-5-goniis, angulis obtusis, lateribus leviter con- 

 vexis, margine suberoso-verrucosis, verrucis (laterum) bi- (angulo- 

 rum) tri-quadri-dentatis, intra marginem verrucis similibus sparsis, 

 in centro nullis prffiditis. 



Hab. m colli sito inter Upsaliara et a Vaksala» Sueciae. — Di- 

 raens. 57-63 ^ A2-4:4i, lat. isthmi 26 [x. Ad subgenus Pleurente- 

 rium a claro Lundell conditum pertineret. 



115. Staurastrum submonticulosum Roy et Bisset On Japanese Des- 2m 

 raids p. 238, tab. 269, fig. 7, Notarisia 1886, p. 191. — Parvum, 

 fere aeque longum ac latum; semicellulis irregulariter ovatis, api- 

 cibus rotundatis, sinu parum profundo, primo recto, demum in 

 brevem, validam, emarginatara, bidentulatam spinam quoque latere 

 abeunte; lateribus semicell. raargine 4 spinas sirailes gerentibus, 

 apicibus etiam 2 spinas gerentibus ; seraicellulis e vertice visis 

 triangularibus, lateribus rectis, abrupte angulis in brevissimara 

 spinam abeuntibus contractis; membrana levi. 



Hab. ad «Junsai nuraa» Japonia^. — Dim. 32^32, lat. isthmi 

 14 [x. Slaurastro monticuloso Brob. siraile, 



116. Staurastrum forficulatum Lund. Desm. Suec. p. 66, t. 4, f. 5 et 2844 

 in Hedwjgia 1873, p. 105. — Mediocre, paullo latius quara longius 

 (excl. acul.), profunde constrictum, sinu sublineari ; semicellulis (for- 



vavo trigona)) subtrapezicis, dorso truncato v. (forraa; tetragonse) sub- 

 ellipticis, dorso late rotundato, ventre convexis, utroque flne an- 

 gustatis, paullulum productis et in aculeos binos divergentes pro- 

 fundo fissis, margine ad utrumque polum versus verrucis eraargi- 

 nato-truncatis (vel processibus bifidis brevissirais) ornatis; a ver- 



