OF THE THIRD TANGANYIKA EXPEDITION. 161 
Genus EPITHEMIA, Bréb. 
255. EPITHEMIA TURGIDA, ( Ehrenb.) Kütz. Bacill. (1844) р. 34, t. 5. fig. 14 ; 
Rabenh. Fl. Europ. Alg. i. (1864) p. 62. 
Nyasa.—In plankton, Anchorage Bay (June 1904; nos. 9 and 10). In 
swamp, Karonga (29 June, 1904 ; no. 32). Swampy lake margin, Domira 
Bay (19 June, 1904 ; no. 579). 
Victoria Nyanza.—In plankton, near Bukoba (21 Apr. 1905 ; no. 252). 
Tanganyika.— п plankton, near Mbete (28 Sept. 1904 ; no. 105) and near 
Kala (19 Nov. 1904 ; no. 170). Among Utricularia, mouth of Malagarasi 
River (16 Jan. 1905 ; no. 611). 
Genus RHOPALODIA, O. Müll. 
256. RHOPALODIA GIBBA, ( Kütz.) О. Müll. in Engl. Bot. Jahrb. xxii. (1895) 
p. 65.—Epithemia gibba, Айг. Bacill. (1844) p. 35, t. 4. fig. 22 ; W. Sm. 
Brit. Diat. p. 15, t. 1. fig. 13. | 
Tanganyika.—In swampy pond, Mrumbi (27 Dec. 1904; no. 181). 
Var. vENTRICOSA, (Kütz.) O. Müll.—Epithemia ventricosa, Kitz. 
Nyasa.—Swampy lake margin, Domira Bay (19 June, 1904 ; no. 579). 
Victoria Nyanza.—In plankton, near Bukoba (21 June, 1905 ; по. 252). In 
sheltered bay, near Entebbe (1 May, 1905 ; no. 620). 
Tanganyika.—In plankton, Kituta Bay (27 Aug. 1904 ; no. 82) and near 
Sumbu (13 Oct. 1904 ; no. 138). 
291. RHOPALODIA GIBBERULA, ( Ehrenb.) О. Müll. l. c. xxxvi. (1905) p. 165. 
—Epithemia gibberula, Kütz. Вас. (1844) t. 30. fig. 3. 
Nyasa.—Among Algæ in shallow water, Anchorage Вау (15 June, 1904 ; 
no. 12). Оп rocks, Nkata Bay (23 June, 1904; no. 23). In swamp, 
Karonga (2 July, 1904 ; no. 33). 
Tanganyika.—A mong floating Alge, Kituta Bay (26 Aug. 1904 ; no. 19). 
258. RHOPALODIA HIRUDINIFORMIS, О. Müll. 1. c. p. 167. 
Nyasa.—In the plankton, Anchorage Bay (14 June, 1904 ; no. 10). In 
swamp, Kota Kota (20 June, 1904 ; no. 18). On rocks, Deep Bay (25 June, 
1904; no. 26). In swamp, Karonga (29 June, 1904 ; no. 32). In scrapings 
from off bottom of s.s. * Guendolen ? at anchor S. end of lake (15 June, 1904 ; 
no. 577). 
Victoria Nyanza.—In plankton, near Bukoba (21 Apr. 1905 ; no. 252). In 
swampy pool, near Bukoba (20 Apr. 1905; по. 618). Among Utricularia, 
near Entebbe (1 May, 1905 ; no. 620). 
Tanganyika.—In plankton off Niamkolo Island (29 July, 1904 ; no. 36). 
Floating in Kituta Bay (26 Aug. 1904 ; по. 79). Оп rocks, Mbete (29 Sept. 
1904 ; no. 114). In plankton, near Kala (19 Nov. 1904 ; no. 170) 
LINN. JOURN.—BOTANY, VOL. XXXVIII. M 
