4 F. E. FRITSCH. 
TABLE SHOWING THE COMPOSITION OF THE EPIPHYTIC FLORA ON THE CYANOPHYCEOUS 
SHEETS IN THREE ANTARCTIC PONDS. 
> r ce > 99 
Boas hale way Meuoel tee are ome Gap Pond, Winter Harbour. Pond, Granite Harbour. 
Ulothriv subtilis var. variabilis. Ulothriz subtilis var. variabilis. Ulothrix subtilis var. variabilis. 
Pleurococcus antarcticus. Pleurococcus antarcticus. Pleurococcus antarcticus. 
an koettlitzi sp. n. 6 koettlitzi sp. n. | 
Prasiola (young stages). Prasiola (young stages). Prasiola (young stages). 
Dactylococcopsis rhaphitioides. Chroococcus minutus. 
5 minor. | 
Glaocapsa rupicola. | Gleocapsa rupicola. 
Microcystis parasitica. Microcystis parasitica. Microcystis parasitica. 
Microcoleus vaginatus. 
Lynghya lagerheimi. Lyngbya estuarii and var. ant- | Lyngbya martensiana. 
arctica. | 
A attenuata sp. 0. » attenuata sp. 0. 3 scotli sp. 0. 
»  caerugineo-ceruled. 
Oscillatoria tenuis. Oscillatoria wrrigua. Oscillatoria tenuis. 
Pa koettlitzi sp. n. 
Calothrix antarctica sp. 0. Calothri« intricata sp. 1. 
» gracilis sp. n. 
Nostoc sphericum. Nostoc disciforme sp. 1. 
»  longstaffi sp. n. 
5  hederule. 
»»  fuscescens sp. 1. 
Anabena antarctica sp. 1. 
Nodularia quadrata sp. n. | Nodularia spumigena var. minor. 
Tavicula muticopsis. | Navicula muticopsis. Navicula muticopsis. 
5 Cymatopleurus. »  murrayt. | » borealis. 
A shackletoni. »  shackletoni. 
3 globiceps. 
Hantzschia elongata. | Hantzschia amphiorys. 
N. globiceps Greg., N. shackletoni W. and G. 8S. West, N. eymatopleurus W. and 
G. S. West, MN. borealis Kiitz.), Hragilarias (especially £. tenwicollis Heib. var. 
antarctica W. and G. S. West) and LHantzschias (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 Algz is very noticeable 
(cf. W. and G. 8. West, op. cit, p. 265). The publications of Nordstedt t and 
others have shown that Desmids are relatively abundant in these regions. The 
other green Alow are well represented, while the Cyanophycee are appreciably 
less important. Some of the species of Chlamydomonas (C. eaudata Wille,t and 
* Messrs. West also mention the abundant occurrence of Tropidoneis levissima 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 Centric were observed in several samples, although intact specimens were rare. 
+ Nordstedt, Desmid. ex ins. Spetsbergensibus et Beeren Hiland in expeditionibus ann. 1868 et 1870 suecanis 
collects. Ofvers. af Kel. Vet.-Ak. Férhandl. (1872), Stockholm, No. 6, p. 23; Nordstedt, Desmidie: arctow, op. cit. 
(1876), No. 6, p. 18. 
t Cf. F. E. Fritsch, op. czt., p. 322. 
