932 DR. F. E. FRITSCH ON FRESHWATER ALGÆ 
> 
34. ZYGNEMA sp. | 
Sample 4 (red snow!): one very much shrunken filament of about 
twenty cells. 
Diam. of cells =28 ш; cells of the same length, or one and half times as 
long as broad. 
НЕТЕКОКОМТ А, 
СОХЕЕКУАСЕ Ж. 
‚ CONFERVA BOMBYCINA, Ay. Syst. р. 83, n. 103 Rabenhorst, Fl, Europ. 
Aly. ii. 1868, р. 323 ; f. minor, Wille, "m Mitteil., in Pringsh. Jahrb. 
xviii. p. 467. 
Samples 8, 9, 10, 15, rather rare. 
Diam. of cells =6 ш; 2-3 times as long. 
CYANOPHYCEA. 
CHROOCOCCACE.E. 
30. SYNECHOCOCCUS ÆRUGINOSUS Мед. Gatte einzell. Aly. 1849, р. 50, 
t. lk. fig. 1. 
Samples 10, rather rare. 
Cells isolated or in twos; diam. of cells =5 д. 
37. ENTOPHYSALIS GRANULOSA, Ай, Phye. gen. 1843, р. 177, pl. 15. fig. 5. 
Sample 16, common. 
38. ? APHANOTHECE SAXICOLA, Nueg. дай. einzell. Aly. 1849, р. 60, t. 1 H. 
fig. 2. 
Sample 11, rare. 
Microcystis OLIVACEA, Küte. Phye. gen. p. 110; Rabenhorst, Fl. Europ. 
Aly. ii. 1805, p. 51. 
Samples 8, 9, 10, 11, and 14, rather common. Previously recorded from 
Kerguelen (Reinsch). 
40. MICROCYSTIS MERISMOPEDIOIDES, F. W. Fritsch. (Text-fig., E, p. 323.) 
Famili: parvze solidie circumferentia irregulari constant ex Ж pusillis 
quae muco fusco-flavescente vel rarius achroo et, ut videtur, tenaci cohzrent 
Cellule: in facie famili: quaternarie regularissime disposite (ut in genere 
