132 KAARE MÜNSTER STRØM. 



Genus Gomphosphæria Kiitz. 

 9. Gomphosphæria aponina Kiitz. 

 Kasbek — Mleti. 



Order Hormogoneæ. 



Family Oscillariaceæ. 



Genus Phormidium Kiitz. 



10. Phormidium laminosum (Ag.) Gom. 

 lat. trich. f— 1 jn Sc 1,2 ^i. 

 Pjatigorsk, sulphur springs. 



In very great abundance, forming a brick-coloured and a 

 blue-green stratum. 



11. Phormidium amhiguum Gomont: Monographie p. 178. 

 Wittr. & Nordst. exsicc. 492. Lyngbya Juliana. 

 Askabad; lat. trich. 5//; long. cell. 2—3,«. 



Elborus; lat. trich. 4: /n. 

 Mtskhét; lat. trich. 4 iti. 



12. Phormidium tenue (Menegh.) Gom. 

 Elborus ; lat. trich. 2,2 ^i. 



Tiflis; lat. trich. 1 ^u & 1,5 fx. 



13. Phormidium uncinatum (Ag.) Gom. 



Wladikaokas — Kasbek; lat. trich. b /.i; long. cell. 2 — '2,,b f.i. 



14. Phormidium Retzii (Ag.) Gom. 



Kasbek — Mleti; lat. trich. 5^<; long. cell. 4—6,«. 



15. Phormidium suhfuscum (Ag.) Kiitz. 



Kasbek — Mleti; lat. trich. 8 — 9 /< ; long. cell. 3 — 3,b /n. 



Genus Oscillatoria Vaucher. 



16. Oscillatoria formosa Bory. 



Pjatigorsk (From cold, not sulphureous water); 



lat. trich. 5/<; long. cell. 2 — 3 jti. 



Askabad; lat. trich. 6 — 7,5 ^rt; long. cell. 2,5 — 4: /ii. 



Wladikaokas — Kasbek; lat. trich, 6; long. cell. 2,5—3,5 /^ 



Abundant. 



