in 
| 60—66 u, alt. 116—140 u; er. oogon. 68—80 u, alt. 73—92 u; 
er, oospor. 64—73 u, alt. 74—84 u; er. cell. androsporang. 
24-30 u, alt. 18—25 u; er. stip. nannandr, 18—22 u, alt. 
60—68 u; er. cell. spermog. 12—14 u, alt. 10-12 u. 
208. Oedogonium erassiusculum Wittr. ß. idian- 
drosporum Nordst. et Wittr. nov. var. Var. idiandrospora; 
oosporis angulari-oboviformis vel angulari-globosis,; 
_ erass. cell. veg. 25—63 u; alt. 2!,—5'l; plo majore; 
„» oogon. 48—56 „ »„ 87-0 u; 
» 0ospor. 2—54 „ „50-66 (88) u; 
„  androspr. 30—34 „ „ 12—21 u alt.; 
„  stip.nannandr. 15—16 „ „ 60—W , 
0. eell. spermog. 10 «, alt. 18 u; 
 .» membr. oospor. ad 6 u. 
234. Haematococcus nivalis (Bauer) Ag. Forma 
yeahrana valde incrassata gelatinosa, diametro cell. maximo 
60m. 
237. Chlorococcum botryoides Fries.; Kütz. Forma 
familüs in thallum gelatinosum, amorphum, fusco-aurantiacum 
. consociatis; cytioplasmate cellularum pallide flavescenti-viridi; 
 membrana in more Schizochlamydis saepe constructa. 
239. Dietyosphaerium pulchellum Wood. Forma 
_ cellulis confertis, diametro cellularım adultarum 41 —7 m. 
— Species haec aD. Ehrenbergiano Naeg. in primis differt 
cellulis adultis globosis, nec ellipsoideis. Cellulae juveniles 
 (divisione mox facta) etiam D, pulchelli ellipsoideae sunt, 
sed axis longitudinalis cellularum hie Tadialis (in familia 
 globosa), non tangentialis, est positus, 
244, Oocystis solitaria Wittr. nov. spec. O. cel- 
lulis plerumque solitariis interdum in familias e 2—4 cel- 
Iulis formatas consociatis, ellipsoideis, corporibus chlorophyl- 
laceis pulvinatis parietalibus (cellulae totae massa chlorophyl- 
lacea interdum expletae sunt), membrana suberassa in utro- 
que fine tuberculo instructa; longitudine cell. 13—35 
.  erassit. cell. 7—18 u. 
. 248. Hyalotheca undulata Nordst. nov. spec. H. 
'  mimina, filis minus fragilibus, margine undulatis; cellulae 
 diametro 1!);—2 plo longiores, medio excavato-constrietae; 
.  semicellulae globoso-obovatae apice truncatae, a vertice visa®, 
.  perfecte circulares massa chlorophyllacea e nucleo amylaceo 
. eentrali 4-radiata. Latitudo isthmi, latitudinem apieis aequans, 
eirciter tres partes diametri transversalis semicellulae. Long. 
1—14 u; lat. 7—T,5 u; lat. isthmi 5 «. a = 
255. Cosmarium dovrense Nordst. noy. spec Ü. 
metro circiter tertia parte longius, medio modice constne 
