FIGs. 
Kies. 
Fras. 
Tras. 
Tras. 
lias. 
Fras. 
Iras. 
lias. 
Fias. 
Iras. 
Fics. 
Fras. 
Fras. 
Frias. 
¥. E. FRITSCH. 
PLATE II. 
74-78.—Lyngbya lagerheimi (Mo6b.) Gomont ; 74, 75, typical portions of the stratum; 76, 77, two 
filaments from the stratum, showing spiral coiling ; 78, a single filament on a larger scale 
with the contained trichome. (74-77, x 500; 78, X 1200.) 
79-84.— Lyngbya attenuala sp. n.; 79-83, different types of apex of the trichomes; 84, a filament. 
(x 800.) 
85-86.—Lyngbya erugineo-cerulea (Kitz.) Gom.; 85, 85a, normal filament (x 700); 86, filament 
with gonidia (x 800), 
87-90.—Lyngbya estuarti (Mertens) Liebm., var. antarctica var. nov. See p. 27. (87, X 800; 
88-90, & 700.) 
91-93.—Lyngbya scotti sp. n. (91, 92, X 700; 938, x 1200.) 
94-96. si * = var. minor var. nov. (xX 1350.) 
97-98.— Navicula seminulum Gran. (xX 1250.) 
99-100. = stauropteroides sp. n. (99, X 1800; 100, x 1250.) 
101. - cymatopleurus W. and G. 8. West. (x 1250.) 
102-103.—Jicrocystis chroococcoidea W. and G. 8. West. (x 800.) 
104-108.—Nodularia spumigena Mertens, var. minor noy. var. (104-106, x 800; 107-108, x 1300.) 
109-115.—Nodularia quadrala sp. n. 112-114 show different types of apices; 115 shows filament 
with a probably immature spore. (x 800.) 
116-117.—Dactylococcopsis rhaphidioides Hansg. ‘The group in fig. 116 shows a distinct septum in 
several of the cells. (x 800.) 
118-120.—Anabena antarctica sp. n., filaments with spores; the smaller spores in fig. 118 are 
probably immature. (x 500.) 
121-122.—Dactylococcopsis antarctica sp. 0. ; 121, small part of the colony ; 122, a cell in process of 
division. (X 1350.) 
