56 F. E. FEITSCH. 



PLATE II. 



Figs. 74-78. — Lynghya lagerheimi (Mob.) 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.) 

 Figs. 79-84. — Lynglya attemmta sp. n. ; 79-83, different types of apex of the trichomes ; 84, a filament. 



(X 800.) 

 Figs. 85-8G. — Lynghya ceriigiiieo-ccerulea (Kiitz.) Gom. ; 85, 85«, normal filament (x 700) ; 86, filament 



with gonidia (x 800). 

 Figs. h7-90. — Lynghya cesh/arii (Mertens) Liebm., var. an/arctica var. nov. See p. 27. (87, X 800 ; 



88-90, X 700.) 

 Figs. 21-98.— Lynghtja scotti sp. n. (91, 92, X 700 ; 93, X 1200.) 

 Figs. 94-96. „ „ „ var. ?hoto?- var. nov. (x 1350.) 



Figs. 97-98. — JVavlcula seininulum Gvan. (x 1250.) 

 Figs. 90-100. „ stcmropteroides sp. n. (99, X 1800 ; 100, X 1250.) 

 Figs. 101. „ cymatopleurus ^V. a,nd G. S.\Yest,. (xl250.) 



Figs. 102-103. — Microcystis chroococcoidea W. and G. S. West, (x 800.) 



Figs. 104-108. — Nodidaria spumigenaMertens, var. minor nov. va,T. (104-106, X 800; 107-108, X 1300.) 

 Figs. 109-110. — Nodularia quadra/a sp. n. 112-114 show different types of apices ; 115 shows filament 



with a probably immature spore. ( X 800.) 

 Figs. 116-117. — Dactylococcopsis rliaphidioides Hansg. The group in fig. 116 shows a distinct septum in 



several of the cells. ( X 800.) 

 Figs. 118-120. — Anahcena antarctica sp. n., filaments with spores ; the smaller spores in fig. 118 are 



probably immature. ( X 500.) 

 Figs. 121-122. — Dactylococcopsis antarctica sp. n. ; 121, small part of the colony ; 122, a cell in process of 



division, (x 1350.) 



