NED xe 
Achnanthacez, 50. 
Achnanthes, 50. 
PS brevipes, 50. 
5 5 var. tntermedia, 50. 
<3 subsessilis (syn.), 50. 
Algw of Shackleton’s expedition, 1, 2, 6. 
Algal flora, freshwater, of Kerguelen, 3, 6; of 
South Georgia,3,6; of South Orkneys, 1,3, 6. 
Alpine Algee in the Antarctic, 5. 
Anabaena, 8, 48. 
mi antarctica, 4, 43. 
A catenula, 44. 
oH 55 Var. americana, 44. 
Anacystis parasitica (syn.), 24. 
Antarctic Alew, freshwater, 1; 
with Arctic freshwater Alow, 4. 
Aphanothece, 23. 
pa prasina, 23. 
Bacillaries, 46. 
Calothrix, 3, 36. 
a antarctica, 4, 36, 
comparison 
ns cartilagined, 38. 
Fe epiphytica, 37. 
» fusca, 36. 
4 gracilis, 4, 37. 
~ intricala, 4, 36. 
is sandvicensis, 36, 38. 
» sp. (W. and G. 8. West), 37. 
Centrice, +. 
Chlamydomonadacex, 2, 7. 
Chlamydomonas, 4, 7, 10. 
a caudata, 4, 7. 
AA ehrenbergt, 5, 7, 10. 
3 gigantea, ). 
5 intermedia, 5, 7,9, 10, 32. 
os és f. antarctica, 10. 
aa marina, 9. 
sy subcaudata, 5, 6, 7, 32; cyst- 
formation of, 6, 8. 
Chlorella, 16. 
2 conglomerata, 16. 
oH regularis, 16. 
Chloromonas, 10. 
. alpina, 5, 10. 
Chroococcacex, 3, 6, 21. 
Chroococcus, 3, 21. 
5 helveticus, 22. 
9 minor, +, 22. 
) minutus, 4, 21. 
i turgilus, 21. 
Conjugate, 2,3, 6,20; occurrence of, in fresh- 
water algal flora of Antarctic, 5, 6. 
Coscinodiscacer, 46. 
Coscinodiscus, 47. 
i decipiens, 47. 
co griseus, 47. 
op 59 var. gallapagensis, 47. 
*) lacustris, 47. 
Cuticularia (sect. Nostoc), key to species of, 41. 
Cyanophycez, 2, 21; abundance of, in Ant- 
arctic regions, 2, 3; heterocystors forms, 
3, 6; representation in Arctic regions, 4. 
Cyanophyceous sheets, 3; epiphytic flora 
Ois Bi 2h 
Cyclotella, 47. 
a operculata, 47. 
Dactylococcopsis, 22. 
Re antarctica, 22. 
FE montana, 23. 
D muciola, 23. 
som ke rhaphutioides, 4, 22. 
Denticula, 49. 
“ JSrigida (syn.), 49. 
; inflata (syn.), 49. 
Fr tenuis, 49. 
5S »» Var. antarctica, 49; var. fri- 
gida, 49 ; var. inflata, 49. 
Desmids, in Antarctic regions, 2, 3, 21; in 
Arctic regions, 4. 
Diatoma, 50. 
53 ehrenbergi (syn.), 50. 
PA elongatun, 50. 
” 9 
Diatomacere, 50. 
Diatoms, in the Antarctic, 3, 6. 
Dolichospermum (sect. Anubena), 44. 
Epiphytic flora on Cyanophyceous sheets, 3, 4. 
Hucapsis, 5, 25, 26. 
var. elurenbergi, 50. 
