"U'ELWITSCH S AFKICAN FRESHWATER ALG.Ti;. O 



The specimens were even a little smaller than those originally 

 described from the Orkney Isles. 



5. CE. huillense, sp. n. (tab. 365, figs. 7, 8). CE. monoicum (?)_; 

 oogoniis singulis, subrhomboideis, augulis lateralibus mammiformi- 

 bus, a vertice visis stellatis cum processubus sequalibus 8 ; oosporis 

 globosis, oogonia non complentibus. Crass, cell, veget. 7*5 /a; 

 altit. 4-5-plo major; crass, oogon. 24-26 /x ; altit. 24-26 /x ; crass, 

 oospor. 17 /v. ; altit. 17 /x. 



Huilla. In paludibus exsiccandis ; April 1860. No. 176. 



The nearest species to this is <E. mammiferum Wittr. (Prodr. 

 Monogr. (JbJdoi/. 16j, from which it difiers in having eight equal 

 processes round the subrhomboid oogonia, and in the globose oospores. 



6. (E. EoTHii (Le CI.) Pringsh. Beitr. zur Morph. d. (Edog. i. • 

 69, t. V. fig. 4 (1858) ; Wittr. Prodr. Monn;/r. (Edog. 18. 



Forma MAJOR. Crass, cell, veget. 8-5-10'5/^. ; altit. 3^-4i-plo 

 major; crass, oogon. 25-30 //; altit. 19-25 /x: crass, naunandr. 4-5- 

 9-5 /x; altit. 8-5-ll'5 /x; crass. androsporang.7-5/x; altit. 9-5-11'5/x. 



Pungo Andongo. Alga Ijete viridis parce vel submucosa, ad 

 ramulosPodostemacearuminrivulis(Casalale); March 1857. No. 105. 



The small obovate nannandria occurred singly or 2-4 on the 

 under side of the oogonia. 



7. CE. hormosporum, sp. n. (E. dioicum, nannandrium ; 

 oogoniis 3-10 contiuuis, subglobosis vel ovato-ellipsoideis, apicem 

 versus circumscissilibus ; oosporis subglobosis vel ellipsoideis, 

 oogonia complentibus, membrana crassa glabraque ; cellulis sufful- 

 toriis tumidis ; androsporangiis 11-15-cellularibus ; cellula termi- 

 nali obtusa, iuterdum oogonium est ; nannandribus curvatis, 

 2-('?)-cellularibus, in cellulis suflultoriis sedentibus. Crass, cell, 

 veget. 22-27 /x ; altit. 4-|-6-plo major ; crass, oogon. 48-56 /x ; 

 altit. 56-75 /x ; crass, oospor. 46-54 /x; altit. 54-61 /x ; crass, 

 nanuandr. 9-11*5 /x; altit. 47-54 /x; crass, androsporang. 18-19 /x ; 

 altit. 21-24 /;.. 



Huilla. Alga lubrica, viridis, socialis cum Nltella sp. in stagnis 

 pr. Catumba; April 1860. No. 189. 



8. (E. Welwitschii, sp. n. CE. dioicum, macrandrium ; 

 oogoniis singulis gemiuisve, tumidissimis, prope apicem circum- 

 scissilibus ; oosporis globosis (vel raro subglobosis), pa^ne oogonia 

 complentibus, membrana crassa glabraque ; filis masculis paullo 

 gracilioribus quam femineis. Crass, cell, veget. (<?) 17-19 /x ; 

 altit. 3-4-plo major; crass, cell, veget. ( $ ) 18-24 /x; altit. 2-3-plo 

 major ; crass, oogon. 40-46 /x ; altit. 37-50 /x ; crass, oospor. 

 35-38-5 /x ; altit. 36-37 /x. 



Libongo. Freq. ad margines flum. Lifune ; Sept. 1858. No. 204. 



9. CE. TAPEiNOSPORUJi Wittr. Prodr. Monogr. (Edog. 36 (1874). 

 Var. ANGOLENSE, var. n. Var. cellulis vegetativis paullo crassi- 



oribus, oosporis oogonia complentibus. Crass, cell, veget. 3-8-4-5 /x ; 

 altit. 5-6-plo major; crass, oogon. 18-19 /x ; altit. 13*5-15 /x. 



Pungo Andongo. Ad latera boreal, et occid. de Pedra Songue, 

 C. Scgtonema myochroiis var. chorographicwn Qi Dichnthrix (jijpsophUa ; 

 April 1857. No. 12. 



