— loSo — 



by ils fewer l'iiluroplnsls, wliicli iirc nol so slraiylit, and lu- llio [iroiioriiimali'h- lars'cr 

 zvgospores. Tlio lallcr are elliptic, witli somewlial ixiinlcd [kiIcs, wIumims tluisc ol' 

 Sp. polijtdcnidtd are imirh more idiindeil and nul intrei|ncnilv splierical. 



Olher species of Spiroffi/ra, allof wliicli wcre stérile, were (iliserved IVotn Anlio(piia : 

 II"* 6 and 7; and Cundinamarca: 11"* i4, i5, 16, 19, 20 and a/). 



Tamily Desmidiacex. 



i/|(|. Gonatozygon monotaenium \)r. Iîahy. — Antiinjuia : n"* i, •! and 6. 



Var. pilosellum ISokdst. — Anlioquia: n"* i and 2. 



i5o. Gonatozygon pilosum Wolle. — Anlioquia: n" !\. 



i5i. Cyliadrocystis Brébissonii Menegh. — Anlioquia : n"* i and :>. 



102. Netrium Digitus (EnRENB. ) Itzigs. and Hothe. (= Peniuin lainrllosum Kûtz. ; 

 P. navigiiim Turneu; P. elegans Bernard). — Anlioquia : n"^ 3, 4 tind 5. Cundina- 

 marca : n"- 23 and 24. 



\ ai', constrictum W. and G. S. \\'est. — Anlioquia : n" 3. 



i53. Netrium Nâgelii (Bréb. ) Lûtkem. — Cundinamarca; n" 24. 



154- Penium Cylindrus (Ehrenb.) Bréb. — Cundinamarca: n" 24. 



i55. Closterium abruptum \V. West. — Cundinamarca : n" 24. 



i56. Closterium angustatum Kûtz. — Anlioquia: n° 3. 



107. Closterium columbianum spec. nov. 



Cl. .submediocre, cellulis diamètre 6 Vs-plo longioribus, subreclis, leviler allcnuatis 

 polos versus, dorso leviler convexe, ventre recto, polis crassis et subtruncalis ; membrana 

 lulea vel fuscescenle, valde coslata, costis visis 7, juxla apices punctala ; chromalophoris 



Long-. 208 ;;.; lat. 33 ]j. ; lai. apic. 18 \j . (PI. XXIII, %. 09). 



Anlioquia : Laguna above Eslrella near Medellin, Central-Andes ; allil. 25oo m. N» 4- 



Only emply ceils of ihis species were seen, in conséquence of wliich no statemenl can 

 be made wilh regard lo ihe nature of ihe chloroplasts. The gênerai proportions of llic 

 cell, along wilh ils straighlness and ihe few strong coslae, afFord characlers which are 

 qnile diagnoslic. 



In gênerai oulline ihis species bears mucli resemblance to (lie Desmid described from 

 Singapore as Cl. Legiinien W. and G. S. West (in Journ. Linn. Soc. Bol. XXXIII, 

 1897, p. i58, t. 8, f. 5-7), bul ihe laller has a Ihin and perfeclly smoolh cell-wall. 



i58. Closterium didymotocum Cokda. — Cundinamarca : n" 24. 



rSg. Closterium excavatum Borge in Bili. lill K. Sv. Vet.-Akad. Ilandl. Bd. 27, 

 Afd. III, n" 10, p. 19, l. 2, f. 7-9. 



Long. ir).'3-i94 U-; lai. 27-29 [j.. 



Anlioquia : n" 7. 



