KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 61. NIO II. 



11 



G. ramosmn (Skottsb.) Kuck. et Skottsb. — Fig. 2 d-f, 4. 



Syn. Elachista {?) ramosa Skottsb. Ant. Meeresalg. I, p. 54. 



Cells rectangular in ontline, the lower ones long and narrow (c. 45x9[i); chro- 

 matophores more numerous than in the former. Hairs 

 basal, 6 — 9 a thick. Sporangia basal, 75 — 80 X 

 x 21 — 24 a. Lower gametangia 90— 165 x 11 — 15a 

 forming a more or less distinct zone, followed by 

 a sterile zone; upper irregularly arranged, 50 — 80 X 

 X 12 — 15 a or rarely shorter and then much like 

 those in the former. — Pa tagonia: Skyring Wa- 

 ter, Puerto Altamirano on stipes of Adenocystis (St. 

 18, 22. 4. 08, gt.). Fu egi a:. Puerto Barrow, in 

 cryptostomata of Adenocystis (St. 43, 4. 3. 09, sp. 

 & gt., also on the same plant). Falkland Is- 

 lands: Port Louis, on the »Chordaria»-shoots of 

 Ccepidium (St. 11, 7. 2. 08, gt.) 



On Ccepidium, St. 11, also occurs a small 

 epiphytic alga, which I at first took to be a Myri- 

 actis: fig. 4 g — h. Kuckuck, in his no tes, also brought 

 it to that genus. Further researches, however, 

 have convinced me that it is young G. ramosum. 

 The basal parts are plainty visible. The erect fila- 

 ments are much shorter than in the adult plant 

 and the longest cells only 25 x9 a; the hairs are 

 9 a thick, the gametangia (all basal) measure 60 X 

 X 12 [x. Otherwise the two plants are quite like 

 each other. The same species was observed at Cape 

 Pembroke (St. 3, 7. 11. 07) on Scytosiphon. 



Distribution: Subantarct. Amer., Falkl. 



Streblonema Derb. et Sol. 



S. patagonicum nov. spec. — Fig. 5. 



In Castagnea Zosterae. Fila endophytica ir- 

 regulariter ramosa, inter cellulas longitudinales hya- 

 linas hospitis repentia, rhizoideis hyalinis, longissi- 

 mis, ramosis, apice attenuatis, 9 — 12 a crassa, 

 cellulis usque ad duplo longioribus quam latioribus, 

 interdum longitudinaliter divisis. Fila suberecta— erecta, inter paraphyses Castagneae 

 abscondita, brevissima, ad 300 a älta (interdum subnulla), circ. 12 — 15 a lata, cellulis 

 chromatophoris paucis disciformibus instructis, haud raro longitudinaliter divisis, omnia 



Fig. 3. Gononcma pectinatum: a filament, X 180; 

 b part of filament, X 400. 



