F. E. FEITSCH. 



TABLE SHOWING THE COMPOSITION OP THE EPIPHYTIC FLORA ON THE CYANOPHYCEOUS 



SHEETS IN THREE ANTARCTIC PONDS. 



Pond half-way between " Black " and 

 " Brown " Islands. 



i.r subtilis var. rariabilis. 

 rirurococcus antarcticus. 



koettlitzi sp. n. 

 Prasiola (young stages). 

 Dactylococcopsis rhaphidioides. 



Min-oc ystis parasitir//. 

 Lyntjlnja lagerheimi. 



atlenuata sp. u. 

 Oscillatoria tennis. 

 Calothrix antarctica sp. n. 

 Nostoc spliccriium. 



No/liilaria quadriita sp. n. 

 Naviaila mitticopsis. 



cymatopleurus. 



shacldetoni. 



globiceps. 



Gap Pond, Winter Harbour. 



Ulothrix subtilis var. rariabi/is. 

 Pleurococcus antarcticus. 



koettlitzi sp. n. 

 Prasiola (young stages). 

 Chroococcus rninutus. 



minor. 

 Glifocapsa rupicola. 

 Mirrocystis parasitica. 



I.yni/bya ftstuarii and var. ant- 

 arctica. 



attenuata sp. n. 

 cerugineo-cccrule.d. 

 Oscillatoria irrigua. 



koettlitzi sp. n. 

 Calotlirii- intricate sp. n. 

 gracilis sp. n. 

 Nostoc disciforme sp. n. 

 lonr/sfaffi sp. n. 

 hfderulcn. 

 fuscescens sp. n. 

 Anabcena antarctica sp. n. 

 Nndularia spumigena var. minor. 

 Navicula mitticopsis. 

 murrayi. 



Hantzsrhia elongate/. 



Pond, Granite Harbour. 



Ulothrix subtilis var. variabilis. 

 Pleurococcus antarcticus. 



Prasiola (young stages). 



Glitocapsa rupicola. 

 Microcystis parasitica. 

 Microcoleus vaginatits. 

 Lynijbya mar/ensiana. 



scotti sp. n. 

 Oscillatoria tennis. 



Navicula mitticopsis. 

 borealis. 

 shacldetoni. 



Han tzsch ia a mj ill /.///.< . 



A T . globiceps Greg., N. shackletoni W. and G. S. West, N. cymatopleurm W. and 

 G. S. West, N. borealis Kiitz.), Frag Harms (especially F. tenuicollis Heib. var. 

 antarctica W. and G. S. West) and Ilantzschias (H. amphioxys Grun., and H. elongata 

 Grun.), while the other genera appear to be more casual.* Diatoms were rather 

 scantily represented in my material, being common only in two of the samples ; in 

 many habitats they were exceedingly rare. 



In comparison with Arctic regions the scarcity of green Algae is very noticeable 

 (ff. W. and G. S. West, op. cit., p. 265). The publications of Nordstedt f and 

 others have shown that Desmids are relatively abundant in these regions. The 

 other green Algse are well represented, while the Cyanophycese are appreciably 

 less important. Some of the species of Chlamydomonas ( C. caudata Wille,J and 



* Messrs. West also mention the abundant occurrence of Tropidoneis ktvissima W. and G. S. West, in some 

 of the lakes ; I have not met with this form. It should be remarked that abundant fragments of the valves of 

 diverse Centricae were observed in several samples, although intact specimens were rare. 



t Nordstedt, Desmid. ex ins. Spetsbergensibus et Beereu Eiland in expeditionibus arm. 1868 et 1870 suecanis 

 collects;. Ofvers. af Kgl. Vet.-Ak. Forhandl. (3 872), Stockholm, No. 6, p. 23 ; Nordstedt, Desmidiere arctore, op. cit. 

 (1876), No. 6, p. 13. 



t Cf. F. E. Fritsch, op. cit., p. 322. 



