18 
paper encloses all tlie Algæ known from the hot springs 
in Spitzbergen. 
All the Algæ formerly observed from fresh waters 
in Spitzbergen are mentioned in the excellent work of 
Dr. Borge on: »Die Süsswasseralgenflora Spitz- 
bergens» (Yidenskapsselskapets Skrifter I. Mat.- 
Naturv. Klasse 1911. N:o 11). 
The present list adds 13 new species to the flora of 
Spitzbergen. (New species are marked with an asterisk). 
Where no locality is mentioned, the Algæ are from 
Bock Bay. 
Myxophyceæ. 
Chroococcaceæ. 
*1. Chroococcus minor (Kuetz.) Naeg. 
Chamæsiphoneæ. 
*2. Chamœsiphon gracilis Rabh. 
In specimens of Oedogonium, 
Oscillatoriacese. 
*3. Oscillatoria formosa Borw 
*4. Phormidium ambiguum Gom. 
5. Phormidium autumnale (Ag.) Gom. 
*6. Phormidium laminosum (Ag.) Gom. Snadden Bay. 
Lat, hi. 0,7 — 0,8 p . Bock Bay. 
*7. Lyngbya cerngineo-coerulea (Ag.) Gom. 
Diatomaceæ. 
Pennatæ. 
8. Fragilaria œqualis Heib. 
9. Navicula sp. 
10. Stauroneis polymorpha Lagerstedt. This species 
occurred in abundance in many collections. Size: long. 
19 p , lat. 6,5 p . 
11. Cymbella parva W. Sm. Size: long. 34 p , lat. 
10 p. 
12. Cymbella sp. 
13. Nitzschia sp. 
14. Surirella ovata Kuetz. 
