Protococooideit}, PalmellaceiX), Selenospluvnura. 661 



Hab. iii stagnis turfosis, aJ u Wurzeii )) Saxonia) (Bulnheim), 



prope u Wohlau » (Hilse) aliisque Silesias locis (Kirciiner), pr, 



u Magdaleiia )) circa u Wittingau » Bohemi;e (Hansgirg) locisque 



variis Suecia) (Lageriieim) et Americae borealis (Wolle). 



4. Dictyosphaerium Hitchcocitii Wolle Freshw. Alg. U. S. p. 186, trj.54 

 t. 157, f. 12. — Cellulis viridibus, late ovatis, subinde diametro 

 dimidio longioribus, ssepe medio constrictulis, chlorophoro centrali 

 multiradiato, pyrenoiden majusculum obvolvente instructis, 18-20 



=; 10-13, series radiantes ramosas efformantibus filainentisque gra- 

 cilibus, hyalinis, gelatinosis connexis; familiis irregulariter sphse- 

 ricis. 



Hab. in aquis stagnantibus New-Jersey Americae borealis 

 (Wolle). 



5. Dlctyosphaerium globosum Richt. in Hedwigia 1884, p. 65, — Cel- 1555 

 lulis globosis, 5-7 u. diam. post divisionem oblongis, filis propriis 



di- tri- vel polychotome divisis. 



Hab. inter Algas in patina diu asservatas ad Lipsiam (?) in 

 Germania. — Thallus 38-56 a. diam.; multiplicatio fit bipartitione 

 vel quadripartitione sec. auct. — Ex Richter 1. c, Actidesmium 

 Hookeri Reinsch quod confer, esset generi Dictyosphcerio adscri- 

 bendum. 



SELENOSPH/ERIUM Cohn [1879] Desmidiaceae Bongoenses p. 13 

 (Etym. selene luna et sphaira spha^ra). — Familia^ cellularum con- 

 tigue aggregatarum Iibere natantes, strato simplici iai peripheria 

 globi ellipsoidei cavi radiatim aflfixae; cellula^ singula3 subrenifor- 

 mes, obcordata^, biloba^, vertice utiinque in mucrones binos excur- 

 rentes, basi in stipites tenues, a^quilongos, quorum ope in super- 

 flcie globi centralis affinguntur, productae. 



1. Seienosphaerium Hathoris Cohn Desmid. Bongoenses p. 13, t. XI, ir,r,G 

 f. 16-17. — Cellulis 8-permultis, in superficiem ellipsoidei cavi 

 congestis, semilunatis, obcordatis, bilobis vel bifidis, vertice levi- 

 " ter vel profundius emarginatis, utrinque longe bimucronatis, mem- 

 brana arcta non gelalinosa circumdatis, breviter stipitatis; fami- 

 liis 35-50 u.. diam.; cellulis 10 =; 16-22; stipitibus 10 u.. 1.; cavo 

 ellipsoideo 10 a. diam. 



Hab. in aquis substagnantibus inter Utriculariam stel- 

 larem ad « Gir » in terra bongoensi Africa; (ScmvEiNFURT). in 

 Brasilia (LoEFGREN sec. Nordstedt in litt.). 



