6 WELWITSCH S AFRICAN FKESH'«=ATER ALG^. 



10. (E. LONDiNENSE Wittr. J. c. 39 (187-i). Forma oogoniis supra 

 medium circumscissilibus, cellulis sufi'ultoriis saepe iuflatis. Crass, 

 cell, veget. 12-5-13*5 /x; altit. 4-6-plo major; crass, oogon. 26-31 /x ; 

 altit. 27-31 /x ; crass, oospor. 24-28 /x ; altit. 24-28 /x. 



Pungo Audongo. In pascuis spongiosis breve graminosis juxta 

 rapes gig. pr. Catete, sparsis c. BichotJirix fjijpsopldla; May 1857. 

 No. 111. 



11. CE. angustissimnm, sp. n. (E. monoicum (?) ; fills vege- 

 tativis irregulariter flexis et angustissimis; oogoniis binis, transverse 

 iuflatis ; oosporis transverse ellipticis, partem inflatam oogonii com- 

 pleutibus, membrana glabra. Crass, cell, veget. 1-8-2 /x; altit. 

 7-14-plo major; crass, oogon. 9-5 /x ; altit. 10-5-14-5 /x ; crass, 

 oospor. 9'5 /x ; altit. 6*5 /x. 



Huilla. lu uligiuosis editioribus prope Humpata, Empalanca 

 et Lopollo, plagas spougiosas unacum Eriocauloneis, Xyridibus et 

 Utriculariis constituens ; May 1860. No. 15. 



This species comes nearest to Gi. tenuissimum Hansg. (in 

 Notarisia, 1888, 398), but differs in being narrower, in having 

 longer cells, binate oogonia, and smaller oospores which completely 

 fill the latter. 



12. CEdogonium sp. Crass, cell, veget. 2-3-3-2 /x ; altit. 5-12- 

 plo major. 



Huilla. Epiphyticum in Zygncma sp., in paludibus exsiccandis ; 

 April 1860. No. 176. This species may be a form of (E. tenuis- 

 simum Hansg. with longer cells, or oi (E. minutissimum Gruu. (in 

 Eabenh. Fl. Europ. Algar. hi. 352). 



13. (Edogonium sp. Crass, cell, veget. 8*5 /x; altit. 6-7-plo 

 major; crass, oogon. 24-30 /x ; altit. 26-33 /x ; crass, oospor. 

 23-29 /x ; altit. 23-29 /x. 



Huilla. In uligiuosis editioribus prope Humpata, Empalanca, 

 et Lopollo ; May 1860. No. 15. Insufficient for accurate determi- 

 nation. 



14. (Edogonium sp. Crass, cell, veget. 25-32 /x ; altit. 1^-3-plo 

 major. 



Mossamedes. Freq. in stagnis puris ad ripas flum. Bero; Aug. 

 1859. No. 190. 



15. (Edogonium sp. Crass, cell, veget. 56-63 /x ; altit. 1-2-plo 

 major. 



Pungo Andongo. Stirps amcenissime viridis, ad limum justa 

 rivulum Casalale crescens ; Febr. 1857. No. 106. Ad ramulos 

 Podostemacearum in rivulis (Casalale) ; Mar. 1857. No. 105. 



IV. — Ulvace.e. 

 1. Enteeomorpha Link (1820) ; em. J. Ag. (1883), 



1. E. WELWiTSCffli J. Ag. Till Algernes Systemat. vi. 143 (1883). 

 Rntcromorpha sp. Welw. Phyc. Lusit. n. 289. Long, usque 4-5 mm. ; 

 lat. 21-61 /x ; diam. cell. 5-ll'5 /x. 



Loanda. Ad folia palmarum (Cocos nucif.) diutius in oceano 

 agitata, prope Praia de Nazareth ; Febr. 1854. No. 29. 



