4 WELWITSCH S AFRICAN FRESHWATER ALG.E, 



H. roseo-purpurea, saxa silicacea rivulorum colore amoenissime 

 roseo ornans ; cellulis quadratis, interdum subquadratis sed semper 

 angularibus, in seriebus verticalibus ordinatis. Diam. cell. 3-5-5 //. 



Golungo Alto. Ad silices in rivulis sylv. primit. de Quibanga 

 pr. Sange, June 1857. No. 150 (I. and II.). Welwitsch remarks 

 that the rocks were of a most beautiful rose-colour for half an hour's 

 walk along the stream. 



CHLOROPHYCE^. 

 III. — (Edogoniace.e. 

 1. BULBOCH^TE Ag. (1817). 

 1. B. ANGULOSA Wittr. & Lund, in Wittr. Prodr. Monoy. (Edog. 

 45(1874). Crass, cell, veget. 12-5-15 /j.; altit. l^-2i-plo major ; 

 crass, oogon. 40-44 /x ; altit. 35-40 /x ; crass, naunandr. G-7-5 /x ; 

 altit- 23-27 /x; crass, audrosporang, 10-12 /x ; altit. 9-5-13-5 //. 

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

 In these African plants the oogonia were under the andro- 

 sporangia, and were rotundo-rhomboid, with the superior margins 

 straight (not retuse) ; the naunaudria were not epigynous, but 

 scattered. 



2. (Edogonium Link (1820) ; Wittr. em. 



1. CE. CRYPTOPOEUM Wittr. Disjws. Q'Jdog. Suec. 19 (1870). 

 Crass, cell, veget. 7*5 /x; altit. 3^-4i-plo major; crass, oospor. 

 22-23 IX ; altit. 21-22 /x. 



Loanda. Represa do Maghelano pr. Boa vista ; Feb. 1854. 

 No. 194. 



2. (E. CEISPUM (Hass.) Wittr. Prodr. Monoy. (Edog. 10 (1874). 

 Var. Uruguayense Magn. & Wille, Bidraq til Sydamerik. Alq.-ji. 



39, t. ii. fig. 63 (1884). Crass, cell, veget. 13-5-15 /x; altit. 2i-o- 

 plo major; crass, oogon. 31-34 /x ; altit. 28-32 /x ; crass, oospor. 

 28-32 fx ; altit. 27-31 yu. 



Loanda. Represa do Maghelano pr. Boa vista, c. ffi. crypto- 

 porum; Febr. 1854. No. 194. 



3. CE. GRAciLLiMUM Wittr. & Lund, in Wittr. Prodr. Monoyr. 

 (Edog. 15 (1874). 



Forma major. Crass, cell, veget. 6-5-7 /x; altit. 3|— 6-plo major; 

 crass, oogon. 20-23 /x ; altit. 32-35 /x ; crass, oospor. 17 /x ; altit. 

 24/*. 



Huilla. In udis sylvaticis et apricis inter Moniuo et lac. Ivan- 

 tala, c. Porpliyrosiphon Notarisii Kiitz. ; April 1860. No. 14. 



4. CE. Itzigsohnii De Bary, Ueb. OH dog. und Bulb. 56, t. iii. 

 fig. 29-32 (1864) ; Wittr. Prodr. Monogr. (Edog. 16. 



Var. BiiNOR West, Notes on Scotch Freshw. Alg., Jonrn. Bot. 

 April, 1893. Crass, cell, veget. 4-8-5-7 /x; altit. 5-8-plo major; 

 crass, oogon. 21-29 /x ; altit. 17-30 /x ; crass, oospor. 13-5-18 /« ; 

 altit. 13-18 /x. 



Pungo Andongo. Freq. c. Scytonema myochroiis (Dillw.) Ag. 

 var. chorograpldcum, temp. pluv. (i. e. Dec. usque Apr.) liete vege- 

 tans, ad Pedras negras in summis rupibus ; Febr. 1857. No. 6. 



