WELWITSCh's AFRICAN FRESHWATER ALG^. 301 



XXII. — Cham^siphone.e. 

 1. Sph^erogonium Eostaf. (1883). 

 1. S. incrustans (Grun.) Rostaf. in liosprawy Sprawozd. Posiedz. 

 Akad. Umiej. x. 282, 304-5, t. v. f. 1-7 (1883). Chammiphon in- 

 crustans Gran, in Rabenb. Flor, Europ. Alj. ii. 149. Lat. 3-3-5 /x; 

 long. 6-10 IX. 



Pungo Andongo. Epipbyticum supra Zygnema ericetorum ad 

 Podostemaceas in riv. de Cabondo ; Febr. 1857. No. 108 



XXIII. — Cystogone^. 



1. Dermocarpa Crouan (1858). 



1. D. depressa, sp. n. D, cellulis plus minusve aggregatis, 

 multe depressis, irregulariter discoideis ; protoplasma cellular unius- 

 cuj usque sporas 8 formante. Diam. cell. 5-10 /*, altit. 2-7-3-8 /a ; 

 diam. spor. 1-8 /a. 



Loanda. Epipliytica supra Pithophoram radiantem in aquariis 

 aquae subdulcis insulae Cassanga pr. Morro da Cruz ; April 1854. 

 No. 197. 



XXIV . — ChroococcacejE . 



1. Gl(eothece Nag. (1849). 



1. G. coNFLUENs Niig. Giitt. eluz. Al[/. 58, t. i. g, f. 1 (1849). 

 Long. cell. 4-5 /x ; lat. cell. 2 /a. 



Golungo Alto. Cum Chrooeocco schizodermatico var. badio-piir- 

 piireo, ad rupes juxta riv. Coango; June 1856. No. 139. 



2. Merismopedia Meyen (1839). 



1. M. glauoa (Ehrenb.) Nag. I. c. 55, t. i.D, f. 1 (1849). Gonium 

 (jlaucum Ebrenb. Diam. cell. 3-8-4-2 /x. 



Huilla. Inter Utriculariam , Morro de Lopollo ; April 1860. 

 No. 179. 



2. M. HYALiNA Kiitz. Phyc. Germ. 142 (1845) ; Tab. Phyc. v. 

 12, t. 38, f. i. (1855). Diam. cell. 1-5 /a. 



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



3. Tetrapedia Reinscli (1867). 



1. T. aversa, sp. n. T. minutissima, paullo latior quam longior, 

 profunde constricta in medio, sinu acutangulo et aperto, lobis 

 lateralibus late rotundatis, apicibus concavis ; a vertice visis elliptico- 

 oblongis. Long. cell. 9'5-10-5 //, lat. 10-5-1 1*5 //,, lat. constrict. 

 4-4-5 ju,; crass, cell. 5*5 jx. 



Pungo Andongo. In stagnis prope Anbilla (Condo) ; Marcb 

 1857. No. 177. 



4. Gl(eocapsa Kiitz. (1843) ; em. Nag. (1849). 



1. G. GELATiNosA Kiltz. Phyc. Geuer. 174 (1843) ; Tab. Phijc. i. 

 (1845-9), 15-16, t. 20, f. vi.i; Rabenb. Flor. Kurop. Aly. ii. 39. 

 Diam. fam. 8-5-28 n ; diam. cell. 3-5-5 /x. Tbe integuments were 

 very fine, and occasionally of a yellowisb colour. 



Ambaca. Alga rupestris, latas plagas rupium cavernae Puri- 

 Cacarambola internarura colore viridissimo tingens ; Oct. 1856. 

 No. 154. 



