ioi6 



"Family Oscilîatoriacex. 



11. Oscillatoria amphibia Ag. — AiUi()(|iiia : n"* i, :>, 5, G and kî. 



12. Oscillatoria chlorina Kiirz. — Cuiuliiiamurca : n" 19. 

 i3. Oscillatoria formosa Bory. — .\iUioqiiia n" 6. 



\l\. Oscillatoria limosa Ag. — AiUioquia n" 6. 

 lô. Oscillatoria splendida Gnicv. — Ciindinainarca: ii" 19. 

 Tlie exlreniilit's of tlie Klameiits were nmcli atlenualed and capilate. 

 i(j. Oscillatoria tenuis Ag. — Anlioquia: 11°* i and 2. Cundinaniarca : n"' lO, 22, 

 and 2.1. 



Var. tergestina i^Kiirz.) Rabenii. — Anlioquia: 11° i3. 



17. Phormidium fragile (Menegii.) Gom. — Anlioquia n" 10. 



18. Phormidium tenue (Menegh.) Gom. — Cundinamarca : n°* i4 and 17. 



19. Lyngbya bipunctata Lemm. — Anlioquia: n"'' i and 2 ; crass. fil. i p.. 



20. Lyngbya putealis Mont. — Anlioquia : n" 4- Crass. fil. 9 (x ; crass. trich. C-8 \j.. 



21. Lyngbya major 1\Ie.\k(;ii. — Anlioquia: n" 6. Crass, fil. 19-20 p.; crass. Irich. 

 i4,5 ;j.. 



22. Lyngbya sp. ad L. aestuarum Liebman accedens; crass. fil. 27 j;. ; crass. Iricli. 

 22 \J.. Cundinaniarca: n° 21 (planklon). 



Only a few fraçmenlary filaments of tliis species were observed, and ils exact iden- 

 tification was therefore uncerlain. 



Tamily T^osîocacex. 



23. Nostoc paludosum Kûtz. — Anlioquia: n" 10. Cundinamarca: n" 24- 



24. Anabaena flos-aquae (Lyngb.) Bréb. — Cundinamarca: n° 21 (planklon). 

 Several slerile species of Anabœna were observed from Anlioquia (n°* i and 2) and 



Cundinamarca (n" 24), but ihey were loo fragnieiilary for cerlain identification. 



25. Cylindrospermum minimum sp. nov. 



C. filis in stag-nis natanlibus, non in stralo aggregalis ; tricliomatibus pallide a'rugi- 

 neis, brevibus, sidjrectis vel leviter curvalis ; cellulis cylindricis, dianietro i Yo-2-plo lon- 

 gioribus, polis rotundalo-lruncalis ; lielerocyslis parvis, cilipsoideis vel ovoidcis ; sporis 

 angustis et cylindrico-oblongis, episporio glabro. 



Crass. cell. 1,8-2 (/.; crass. helerocysl. 2-2,2 [x; long, heterocyst. 2,6-2,7 V-'^ ''jiig. 

 spor. 7,5-10(7.; lat. spor. 3,3-3,7 [A;long. tôt. trich. (ut visis) 5o-64 [>■. (IM. XXI, fig. i-3). 



Anlio(/nia : Laguna above Eslrella near Medellin, Central-Andes ; altil. 2800 m. n» 3. 



Tliis minute Ci/lindrospermiim is llie smallesl of ail llie known species of the genus, 

 and was observed in quantily lloating freely among ollier Algte. Il is dislinguished froni 



