— io3i. — 



Aiiliiii|iiia : ir'- 0, tj ;uiil m. l.Diiy. i(i8'|-i i ij.'î u.; hit. 7i)-Si> p.; lat. a[)ic. •,>(i-'ii (;.. 



(liiiHliiiaiiiaroa : n« !>!^. l^oiii^ KiHo-i/iç).") ;;. ; lai. [û'2-iû8 [i.; lai. a|)ic. 3o u. 



Tliis vai-ielv of C/. /iirt/iiliim is une ot' llie largesl known Desmiils aiid is a|iitai('iillv 

 conliiioil lo Soulh America. Il was first described fi'oin Brazil, biil lias sincc bceii rumul 

 iii Bolivia, Parag'uay aiid Ecuador. Il was abiiiidaiU iii Laguna de IJbaque, Ciiiidina- 

 mai'ca (ii» -l'X), aiid tlie spécimens werc exccplioualh tiiu\ 



ly'l. Closterium Ulna Focice. — (Jundiiiamarca : iv :>/|. 



17."). Pleurotaenium eugeneum ( Iurn.) W. and <i. S. ^^'l:sT, .Mon(ii;r. Hrit. Dcsin. I, 

 11)0.4, p. 2o:>. 



Forma celliilis paiillo aimnsliorilius ; semicellulis ad basin /(-undiilalis, ad apiceni 

 lubiTciilis 16 {Cf visis). 



Long. 760-820 a; lat. ad. bas. semicell. 36,5-39 p.; lat. apic. 27-28 ij. [V\. III, tig'. 62). 



Cundinamarca : n» 23. 



176. Pleurotaenium Trabecula (Ehrenb.) N.îg. — Cundinamarca: n» 22. 



177. Pleurotaenium maximum (Heinsch) Lund. — Anliocjuia: no 6. Cundina- 

 marca: n" i!\. 



Long'. y20 [A ; lat. bas. inflat. semicell. 53 [^. ; lai. med. semicell. 48 11.. 



178. Euastrum attenuatum Wolle, 1881 ; Desm. U. S. i884, p. io3, t. 26, f. 17 ; 

 W. and G. S. Wesl, char, emend. in Trans. Linn. Soc. Bot. ser. 2, V, 1896, p. 243, 

 t. i4, f. 20-21. E. Hastingsii Wolle, Desm. U. S. new edit. 1892, p. n3, I. l\-i, 

 f. 16, 17. E. ppctinaluin Bréb var. porreclum Borge. in Bih. lill K. Sv. Vet. Akad. 

 Handl. Bd. 27, Aftl. III, n» 10, 1901, p. 27, l. i, f. 10. 



Anlioquia : no 5. 



This characleristic Desmid was fréquent ainong E. evoluliun, E. qiiadriceps, 

 E. piclum, etc. It is a very distinctive American type. Il lias no near relationship to 

 E. pectinatuni, having- a polar lobe which is almosl unique in the whole genus (cfr. 

 W. and G. S. West, /. c). 



179. Euastrum binale (Turp.) Ehrenb. forma Gutwinskii Schimidle. — Anlioquia: 

 n" 5. Cundinamarca : n» 24. 



Var. subelobatum W. West. — Anlioquia : no 6. 



(80. Euastrum brasiliense Borge in Arkiv for Bolanik utgifr. af K. Sv. Vet. -Akad. I, 

 1903, p. 112, l. 5, f. I. 



Forma minor. 



Long. 54 j7.; lat. 29 y.; lat. lob. polar. 17 u.; lat. istlim. 10 jj.; crass. 22 (^-(PI. XXII, fig. 37). 



Cundinamarca: n» 24- 



This species is very ciosely allied lo E. ansntum Ralfs, l)ul dilFers in the relalively 

 more massive lower half of the semicell, and in ihe shorter and wider polar lobe. The 

 protubérances on the front of the semicell are very similar, but the one immediately 

 above the islhmus is somewhat more prominent and the two upper oncs less proniinenl 

 in E. brasiliense tlian in E . ansalam. 



