382 ALG^ FROM CENTRAL AFRICA. 



no. 679. Crass, fil. 7'7-ll*5 /x; long. cell. 3-8-5-5 /x ; diain. spir. 

 42-46 /x; anfractibus 40-48 /x inter se distantibus (Figs. 5-6). 

 Lake Losuguta (water with sulphides). 



This is a most interesting alga, having been recorded hitherto 

 only from Uruguay. The African plant is a little stouter, and has 

 the spirals somewhat closer together; the habitat "water with 

 sulphides " is also remarkable. 



ChROOCOCCACEvE. 



38. Chroococcus turgidus (Kiitz.) Niig. Gatt. Einzell. Alg. 46 ; 

 Eabh. Fl. Europ. Alg. ii. 32. Frotococcus tw(/ U us Kixiz. Tab. Vlujc. 

 i. 5, t. V. f. 1. Diam. cell, sine integ. 5-5-9-5 x 10-5-17'5 /x, cum 

 integ. 15-25 x 20-29 /x. Mwangadan River, S. of Fuladoga. 



39. Coelosphaerium confertum, nov. sp. (Fig. 3). C. thallo 

 globoso parvo ; cellulis minutis periphericis, subglobosis angulari- 

 globosisque, plerumque quaternis, confertis. Diam. thall. 125 /x; 

 diam. cell. l-8-2'4 /x. Mwangadan River, S. of Fuladoga. 



40. Merismopedia glauca (Ehrnb.) Niig. Gatt. Einzell. Ahj. 55, 

 t. i. D, f. 1 ; Rabh. Fl. Europ. Alrj. ii. 66. Diam. cell. 2 /x. 

 Inkuyuni, Kamassia. 



41. M. PUNCTATA Meyen ; Rabh. I.e. 57. Diam. cell. 4-4-5 /x. 

 Mwangadan River, S. of Fuladoga. 



DlATOMACE^. 



42. SuRiRELLA ovALis Breb. (W. Sm. Brit. Diat. i. 33, t. ix. 

 fig. 68). Mwangadan River, S. of Fuladoga. 



43. S. ANGUSTA Kiitz. [S. apkntlata W. Sm. Brit. Diat. ii. 88, 

 N. 24] . Inkuyuni, Kamassia. 



44. Cymatopleura Solea W. Sm. (I.e. i. 36, tab. x. fig. 78). 

 A broad form ; long. 138 p; lat. max. 45 p. Inkuyuni, Kamassia. 



45. Epithemia gibba Kiitz. (W. Sm. /. c. 12, tab. i. fig. 13). 

 Mwangadan River, S. of Fuladoga. Inkuyuni, Kamassia. 



46. E. soREx Kiitz. (W. Sm. I. c tab. i. fig. 9). Mwangadan 

 River, S. of Fuladoga. Inkuyuni, Kamassia. 



47. E. ventricosa Kiitz. (W. Sm. /. c. tab. i. fig. 14). Mwanga- 

 dan River, S. of Fuladoga. Inkuyuni, Kamassia. 



48. Eunotia pectinalis Dillw. ; Eabh. FL Europ. Ah/ar. i. 73. 

 [Himaiitidium pectinale Kiitz. ; W. Sm. Brit. Diat. ii. fig. 280.] 

 Gr. Laschan, Leikipia. Lake Losuguta. 



Var. undulata (Sm.) Ralfs ; Eabh. Fl. Europ. Ah/, i. 74. [Hi- 

 mantidium undulaium W. Sm. Brit. Diat. ii. fig. 281.] G. Laschan, 

 Leikipia. 



49. Cymbella Gregorii Ralfs (Pritch. lufus. 876 ; Eabh. Fl. 

 Europ. Ahj. i. 79). Mwangadan Eiver, S. of Fuladoga. 



50. C. VENTRICOSA Ag. (Eabh. I. c. 82). Forma dorso subelato- 

 convexa. G. Laschan, Leikipia. 



51. CoccoNEMA CYMBIFORME (Kutz.) Ehmb. (W. Sm. Brit. Diat. 

 tab. xxiii. fig. 220). G. Laschan, Leikipia. Lake Baringo. 



