524 DR. Е. Е. FRITSCH ON FRESHWATER ALGJE 
3. P CHLAMYDOMONAS INTERMEDIA, Chod. Alg. Suisse, 1902, p. 135. 
Samples 10 and 11, rather common. 
I am somewhat doubtful about the determination of this form. 
4. CHLAMYDOMONAS NIVALIS (Sommerf.), Wille, Algol. Notizen, xi. in Nyt 
Mag. f. Naturvidenskab. xli. 1903, pp. 147-148. 
Samples 4—6 (red snow !), common. 
Text-fig., A, p. 323. Cf. description on: p. 820; as suggested by Chodat, 
Wille, ete., these resting-cells may include Lagerheim’s C. sanguinea, Diam. 
of resting-cells = 10-20 д. 
5. CHLAMYDOMONAS вр. (Text-fig., C.) 
Sample 4 (red snow !), rather common. 
Resting-cells in а wide sheath of mucilage ; diam. of cell alone 29-10, ; 
of cell + mucilage — 20-28 ш (see also p. 321). 
РНАСОТАСЕ ДУ, 
6. PTEROMONAS NIVALIS (Shuttelw.), Chod. Aly. Suisse, 1902, p. 145, fig. 10 ; 
Wille, Alg. Not. xiii. in Nyt Mag. f. Nature. xli. 1903, рр. 107-171, pl. 3. 
figs. 46-51. (РІ. 10. figs. 22-24 & 31 ; see pp. 310-311.) 
Samples 1-3 (yellow snow !), isolated. 
This species should probably be transferred to the genus Scotiella 
(cf. p. 310). 
Length of individuals =22 д; breadth — 12. 
TETRAS PORACEZE. 
Т. BPHJEROCYSTIS SCHROETERI, Chod. in Bull. Herb. Boissier, v. 1897, p. 296, 
pl. 9, forma nivauis, F. E. Fritsch. 
Famili: microscopic forma paulo irregulariore quam in specie typica ; 
cellulee ante divisionem reservant abundantiam adipis, qui invenitur in 
cellulis filialibus ; cellule sunt хере ellipsoideæ. Diam. cell. 27-12 ш; 
diam. cell. fil. =2-3 4. (Text-fig., F-G ; Pl. 11. phot. 2, 8; cf. pp. 314-310.) 
Samples 1 and 3, especially common in the latter. 
PROTOCOCCACELE. 
8. CHLOROSPHÆRA ANTARCTICA, Г. K. Fritsch. (P1. 10. figs. 2-6 ; Р]. 11. 
phots. 1, 8, 5, 6, C.) 
Cellule aut magne spherice singule aut parve, paulum angulares in 
familias parvas consociatie ; cellulæ magne et interdum cellule рагу vagina 
mucosa ampla munite ; membrana modice incrassata, plerumque priebentes 
duo strata ; chromatophora fere sphierica cum foramine parvo in una parte ; 
> 
