Mjrxophyceoe, ChamsesiphonaceEe, Pleurocapsa. 123 



ellipsoideis vel etiam, e mutua pressione, subangulosis, in lilamcn- 

 tum breve si^pe irrogulariter dichotomum 4-10 cellulis exstans 

 vel etiam in acervulos subglobosos consociatis; contentu sordide 

 coeruleo vel olivaceo tenuissimc granuloso; inembrana mediocriter 

 tenui, achroa; gonidiis globosis 3-i {a. latis, 8-32 in gonidangia 

 12-20 [1. diametro inclusis. 



Hah. in veteribus conchis Anodontarum, Limna^orum, 

 Pl a n orb i u m etc. in societate Trentepohlim de-Baryaace et Apha- 

 nocapscB Anodontce crustas fusco-caeruleo-virides formans in aquis 

 dulcibus prtecipue lacuum et fossarum Bohemice, AustricC (IIans- 

 gikg), in India ad «Poona» (Hansgirg) et in conchis lacus montani 

 prope « S. Francisco, Calif. » (Osterhout, Gardner). 



9. Pleurocapsa cuprea Hansg. Beitr. Alg. Tir. u. Bohm. (1892) p. 149 312 

 (incl. Chroococco fusco-violaceo Hansg. var. cupreo-fusco Hansg.). 



— Strato tenui, crustaceo, maculas laete rubras vel aeneo-rufas 

 fingente; cellulis veg. 3-6 [x latis, globosis vel e mutua pressione 

 fere angulosis, raro dimidio usque sesquilongioribus ; contentu 

 brunneo-rufo, granuhi nucleiformia 1 vel 2 valde lucem refringentia 

 circa 1 {x. lata includente; membrana simplici, raro tcgumento fere 

 indistincto circumdata. 



Hcib. in rivulis alpinis, in saxis, in aquis claris et rapide cur- 

 rentibus, inter «Tellnitz» et «Schonv^ald» in Bohemia (Hansgirg); 

 pr. «Pergine, Rovereto, Ala» etc. in Tirolia (Hansgirg). — Celluhe 

 saepius 12-15 {x. latie (raro ultra), in acervulos consociatse. 



Species insufficienter descripta. 



10. Pleurocapsa caldaria (Tild.) Setch. in C. H. et S. Phyc. B. Am. 313 

 n. 851, Proiococcus hotryoides f. caldaria Tilden Some West 

 Amer. therm. Alga^ in Bot. Gazette vol. XXV, p. 94, t. VII, f. 18 

 (1898), Amer. Alg. n. 283, Chroococcus varius Tild. in Bot. Gaz. 

 loc. cit. p. 104, t. VII, f. 21, Amer. Alg. n. 198 (fide Setchelli). 



— Strato Ia3te vel luteo viridi, siccitate expallesenti, expanso; 

 cellulis globosis, 4-6 {x diam., plerumque singulis; tegumento tenui, 

 homogeneo, la3te viridi. 



Hab. socia Microspora anioona f. thermali in surgen- 

 tibus thermalibus « Nat. Parl^. » Amer. bor. (Tilpen) et in « De- 

 vil's Kitchen Geysers » Californiiie (Setchell). 



