— 1028 



elli|ilnMs, mai'yine uiio ronvexo, maru;iiu' alkTO vaille coiivexo, polis sublrimcatis ; mcin- 

 luaiia s[)oraiiiiii subcrassa, luteola et dense piinctata. 



Lai. eell. vetçet. i3-i5 u. ; long, aplanospor. 34-.'^<^ i>-\ lai. aplanospor. 2/1-26 [;.. 

 (PI. XXI, il-. 2/1.) 



Aniior/uia : Lat^uiia above Eslella near Mcilellin, Central Andes ; allil. 2r)oo m. n" /j. 

 Tliis species seems well characterized by ihe great length of ils végétative cells, the 

 nunierous pyrenoids in ihe chloroplast, and the shape of the aplanospores. The chloro- 

 plast only occupies abont three-quarlers of the length of the végétative cell and ihe pyre- 

 noids are arranoed in an irregular séries. The wall of the inaliire aplaiiospore is fairly 

 ihick, of a vellovv or vellowish brown colour, and fineiy punclale. 



i42. Mougeotia (Gonatonema) tenerrima sp. nov. 



M. (G.) cellnlis xeyclativis tenerrimis, dianietro circiter 25-3o-plo longioribus, chro- 

 matophora cuni pyienoidibus fi in série singulo ; aplanosporis ellipticis vel leviler oblique 

 elliplicis, diamelro circiter duplo longioribus, polis leviter productis et submamillatis, 

 me ni bran a glabra. 



Lat. cell. veget. 4)5 \>-', long, aplanospor. 24-a5 [i., lat. i2-i3 [a. (PI. XXI, fig. 25.) 



Antiorjuia : Laguna above Medellin, Central Andes ; altit. 23oo m. N°* i and 2. 



This Alga should be compared with Mougeotia (Gonatonema) Boodlei (W. and 

 G. S. West) Collins (cfr. W. and G. S. West in Trans. Roy. Micr. Soc. 1897, p. 476; 

 Ann. Bot. Xll, i8g8, t. 4, f- 1-9), from wliich il differs in ils narrower and proportiona- 

 tely longer cells, and in the shape of the aplanospores. The latter are relalively narrower 

 and possess submamillale polar tliickenings. 



r43. Mougeotia s[). ad M. minutissimam Lemsi. accedens. Lat. cell. veget. 3,5 ja ; 

 long. cell. .54-58 jy. ; chromalophora cum pyrenoidibus 5-6; sporis non visis. — Antio- 

 quia: 11" 10. 



i44- Zygaema sp. (stérile). Crass. cell. veget. 16,5-191^.; inter cellulas leviter con- 

 slrictnin. — Anlioquia: n" 4- 



145. Zygnema sp. (stérile). Crass. cell. veget. 22-23 \j.. — y^ntioquia: n"' i and 2. 



i46. Zygnema ericetorum (Kûtz. ) Hansg. — Anlioquia: n"*' i and 2. 



i47- Spirogyra decimina (Mùll.) Kûtz. forma tropica G. S. West in Journ. Linn. 

 Soc. Bot. XXXVIIl, 1907, p. 106. S. decimina forma W. and G. S. West in Botan. 

 Tidsskrift, XXIV, 1901, p. i6r. 



Crass. cell. veget. 48-53 [a; long, zygosp. 90-107 \j.\ lat. zygosp. 48-49 ['■• 



Anlioquia : n" 8. 



This form agreed in ail respects wilh the Asiatic and African spécimens previously 

 described. 



i48. Spirogyra splendida spec. nov. 



Sp. maxima, cellulis vegelalivis diamelro i '/3-2-plo longioribus, membrana 4 \f- crassa, 

 extremilatibus non replicatis ; chromatophoris 5-6 (plerumque 6) dense aggregatis, latis 

 cum marginibus irregulariter asperis, pyrenoidibus magnis subconferte ordinatis, anfrac- 



