ioafi 
West in Trans. Bot. Soc. Edinburgh XXIII, 1906, p. 3 o, t. 1, fig. 8, 9 (= Sc. brasi- 
liensis Boulin, 1897; Sc. acutiformis var. spinuliferum W. and G. S. West., 1901). 
— Antioquia : n° 3 . 
[17. Ccelastrum sphæricum Næg. — Antioquia: n n 6. 
118. Ccelastrum cambricum Archer. (— C. pulchrum Sciimidle.) — Antioquia: 
n° 4 - Cundinamarca : n° 23 . 
In ail t lie colonies observed (lie cells were 4 -angled. The larges! colonies were 108 p. 
in diameter with cells up to 28 p. in diameter. 
1 rq. Sorastrum spinulosum Næg. — Antioquia : n° 5 . 
Tamily Chaetopeltidaceæ. 
120. Chætosphæridium Pringsheimii Klebaun. — Antioquia: n° 10. Cundinamarca: 
no 14. 
Tamily Tfydrodictyaceæ. 
121. Pediastrum Tétras (Eiirenb.) Ralfs. — Cundinamarca : n° 23 . 
122. Pediastrum sp. (= P. biradicitum Ralfs, Brit. Desm. r 848 , t. 3 1 , f. 3 a et b). 
— Cundinamarca : n° 24. 
123 . Pediastrum Boryanum (Turp. ) Menegh. var. granulatum (Kütz.) A. Br. — 
Antioquia : n° 5 . 
124. Pediastrum duplex Meyen var. clathratum A. Br. — Antioquia: n° 6 . 
Tamily Wolrichaceæ. 
125. Geminella mutabilis (Bréb.) Wille(= Hormospora mutabilis Bréb.). — Antio- 
quia : n» 5 . 
126. Geminella ordinata (W. and G. S. West.) nov. comb. (= Hormospora 
ordinata W. and G. S. West in Journ. Bot. Sept. 1898, p. 33 o). 
Long. cell. 8-1 2,5 p. ; Iast. cell. 5-6 p.. — Cundinamarca: n° 24. 
127. Geminella irregularis Wille. — Cundinamarca: n» 24. 
Long. cell. 6-7 p. ; lat. cell. 10-12 p.. 
128. Ulothrix subtilis Kütz. — Cundinamarca: n os 18 and 22. 
129. Ulothrix tenuissima Ivütz. in Flora, XVI, 1 833 , p. 5 1 8 ; Hazen in Bull. Torr. 
Bot. Club, XI, no 2, 1902, p. 149, t. 20, fig. 5 , 6. 
Forma filis crassioribus, usque 3 o p. diam. ; long. cell. 16-18 p.; chromatophora cum 
pyrenoide singulo. 
Antioquia: n» 6. 
Very l'evv filaments of ibis Alga were observed, but tliey agreed with Ulothrix 
