Io32 
Antioquia : n°s 6, 9 and 10. Long. io84-ri9.3 p,; lat. 79-82 p. ; lat. apic. 20-21 p.. 
Cundinamarca : n° 23 . Long i 38 o-i 495 p. ; lat. 102-108 p. ; lat apic. 3 o p.. 
Tliis variely of Cl. turgidum is one of the largest known Desmids and is apparently 
confined to South America. ït was first described from Brazil, but lias since been found 
in Bolivia, Paraguay and Ecuador. It was abundant in Laguna de Ubaque, Cundina- 
marca (n° 23 ), and the specimens were exceptionally fine. 
174. Closterium Ulna Focke. — Cundinamarca : n» 24. 
176. Pleurotænium eugeneum (Furn.) W. and G. S. West, Monogr. Brit. Desm. I, 
1904, p. 202. 
Forma cellulis paullo angustioribus ; semicellulis ad basin 4 -undulatis, ad apicem 
tuberculis 16 (9 visis). 
Long. 760-820 p. ; lat. ad. bas. semicell. 36 , 5-39 p. ; lat. apic. 27-28 p. (PI. III, fig. 62). 
Cundinamarca : n° 23 . 
176. Pleurotænium Trabecula (Ehrenb.) Næg. — Cundinamarca: 11° 22. 
177. Pleurotænium maximum (Reinscu) Lund. — Antioquia: no 6. Cundina- 
marca: no j 4. 
Long. 920 p. ; lat. bas. inflat. semicell. 53 p. ; lat. med. semicell. 4 § p. 
178. Euastrum attenuatum Wolle, 1881 ; Desm. U. S. 1 884 , P- io 3 , t. 26, f. 17; 
W. and G. S. West, char, emend. in Trans. Linn. Soc. Bot. ser. 2, V, 1896, p. 243, 
t. i 4 , f. 20-21. E. Hastingsii Wolle, Desm. U. S. new edit. 1892, p. 1 1 3 , t. 42, 
f. 16, 17. E. pectinalam Bréb var. porrectum Borce. in Bill, till K. Sv. Yet. Akad. 
Handl. Bd. 27, Afd. III, n° 10, 1901, p. 27, t. 1, f. 10. 
Antioquia : n« 5 . 
This characteristic Desmid was frequent among E. evolatum, E. qnadriceps, 
E . pictum , etc. It is a very distinctive American type. It lias no near relationship to 
E. pectinatum, having a polar lobe which is almost unique in the whole genus (cfr. 
W. and G. S. West, l. c.). 
179. Euastrum binale (Turp.) Ehrenb. forma Gutwinskii Schmidle. — Antioquia: 
n° 5 . Cundinamarca: n° 24. 
Var. subelobatum W. West. — Antioquia : no 6. 
r8o. Euastrum brasiliense Borge in Arkiv for Botanik utgifr. af K. Sv. Vet.-Akad. I, 
1903, p. 1 1 2, t. 5 , f. I. 
Forma minor. 
Long. 54 p.; lat. 29 p.; lat. lob. polar. 17 p.; lat. isthm. 10 p.; crass. 22 p. (PL XXII, fig. 37). 
Cundinamarca: n° 24. 
This species is very closeiy allied to E. ansatum Ralfs, but differs in the relatively 
more massive lower half of the semicell, and in the shorter and wider polar lobe. The 
protubérances on the front of the semicell are very similar, but the one immediately 
above the isthmus is somewhat more prominent and the two upper ones less prominent 
in E. brasiliense tlian in E. ansatum. 
