58 



viridi, granuloso, deniquc fuscescente , in gonidia numerosa dila- 

 bente. v. v. 



Diarn. cell. ad. l jts'" = 0,005". 



b. incrustans, cellulis dense cumulatis, subconnatis, ad l ;io'" crassis. 



c. forma limosa, cellulis in stratum tenue saturate viride, ad , /e»H 

 crassis dense coacervatis. 



Hab. in locis stagnosis, nec non in aquis lente fluentibus, plerumque 

 corporibus submersis affixum ; c. in limo subhumido juxta amnes, rivulos, 



lacuum ripas. 



Ch. humicolo (Cystococcus humicola Naeg. einz. Alg. p. 85 I. 111. &. 

 Rabenh. Krypt. Flor. von Sachs. I. p. 137. Hilse 1. c. p. 117.). Ch. 



strato effuso, obscure viridi , pulverulento ; cellulis globosis, magmtu- 

 dine variis, plerumque numerosis in familias consociatis , tegumento 

 communi hyalino achroo circumvelatis ; cytiodermate tenui, aetate pro- 

 vecta subcrasso; cytioplasmate initio dilute vel luteolo-viridi, homogeneo, 

 demum saturate viridi, granuloso. v. v. 

 Diam. cell. ad. 7i26'" = 0,0007". 



b. forma cellulis majoribus (de Heufler in Rabenh. Alg. N. 1794!). 

 Hab. in terra nuda humida, arborum truncis corticatis et decorti- 

 catis, ubique fere abundans. 



Ch. olivaceum (Cystococcus olivaceus Rabenh. Krypt. Flor. v. Sachd 

 p. 137.). Ch. aquaticum, submcmbranaceum , fluctuans , virescens vel 

 olivaceo-fuscescens; cellulis globosis , minutis , tegumentis subarctis, in 

 strato gelatinoso olivaceo submembranaceo nidulantibus ; cytioplasmai 

 viridi, subtiliter granulato , denique fuscescente, in gonidia numerosa 

 agilia dilabente. v. v. 



Diam. cell. >/i«"' = 0,0006", tegument. ad W = 0,0008". 



Hab. in stagnis, aquariis, plantis aquaticis vivis aliisque corporibus 



submetsis mortuis affixum; ad Dresdam iterum.legi, Viennae et ad 



. Viennam austriacam (e. gr. Berndorf, Schonau etc.) legit cl. A. Grunow. 



Ch. protogenitum (Microhaloa protogenita Bias. Algh. microsc. 



p. 47. T. XIX. (non Menegh.), Microcystis protogenita Rabenh. Flor. 



europ. Alg. II. p. 52.). Ch. laete viride, luteolo - viride , vel sordide 



subaerugineo-viride, in stratum tenue minus cohaerens cumulatum; 



cellulis minutis globosis , numerosissimis in familias vcl majores vel 



minores consociatis, tegumento communi achroo subarctc involutis. v. v. 



Diam. cell. circiter i/isoo'" = 0,00006"; famil. ' ioo - ' : -ns'" = 



0,00022 — 0,00039". 



Hab. in aquis destillatis diu asservatis. 

 Obs. Color a lucis irruptione pendet. 



