OF THE THIRD TANGANYIKA EXPEDITION. 139 
and 23). Among other Alge in scrapings off the bottom of s.s. * Guendolen,' 
at anchor at S. end of the lake (15 June, 1904 ; no. 577). 
Tanganyika.—In swamp, Kituta (23 Aug. 1904; no. 72). Plankton, near 
Sumbu (13 Oct. 1904 ; no. 138) and near Kaia (19 Nov. 1904 ; no. 170). 
159. SCENEDESMUs OBLIQUUS, ( Turp.) Kütz. Synops. Diat. (1834) p. 609.— 
Achnanthes obliqua, Turp., 1828. Scenedesmus acutus, Meyen, 1829; 
Rabenh. Fl. Europ. Alg. iii. (1868) p. 64. 
Муаза.— Оп stones on shore, Domira Вау (19 June, 1904 ; по. 17). Shore- 
pools, Nkata Bay (23 June, 1904 ; по. 22). 
Tanganyika.— Plankton, Lofu River (5 Oct. 1904; no. 123). 
160. SCENEDESMUS QUADRICAUDA, ( Turp.) Bréb. Alg. Falais. p. 66 (1835). 
—Achnanthes quadricauda, Turp., 1828. Scenedesmus caudatus, Corda, 
1838 ; Каз. Brit. Desm. (1848) p. 190, t. 81. fig. 12 a-g. 
Nyasa.—Plankton, Anchorage Bay (13 June, 1904; nos. 3 and 9). On 
shore, Domira Вау (19 June, 1904; no. 17).  Shore-pools, Nkata Вау 
(23 June, 1904 : no. 22). In swamp, Kota Kota (20 June, 1904 ; no. 18). 
In swamp, Karonga (2 July, 1904; no. 33). 6. end of lake (no. 577). 
Swampy lake margin, Domira Bay (no. 579). 
Tanganyika.—In swamp, Mbete (28 Sept. 1904; по. 108). Plankton, 
Kituta Bay (26 Aug. 1904; no. 81), near Kala (19 Sept. 1904 ; no. 170), 
near Kirando (1 Dec. 1904 ; no. 175), near Maswa (14 Jan. 1905 ; no. 211), 
and near Baraka (24 Feb. 1905; no. 240). 
Victoria Nyanza.—Swampy pool near Bukoba (20 Apr. 1905 ; no. 618). 
Sheltered bay near Entebbe (1 May, 1905 ; no. 620). 
Var. MAXIMUS, W. д G. S. West, in Trans. Linn. Soc. sev. 2, Bot. 
v. (1895) p. 83, t. 5. figs. 9, 10. 
Nyasa.—In swamp, Karonga (2 July, 1904 ; nos. 33 and 34). 
Tanganyika.—In plankton, near Sumbu (13 Oct. 1904; по. 138), near 
Chamkaluki (15 Nov. 1904; no. 160), near Kala (19 Nov. 1904 ; no. 170), 
off Kirando (1 Dec. 1904; no. 175), and near Baraka (24 Feb. 1905; 
no. 240). 
Victoria Nyanza.—In plankton, near Bukoba (18 Apr. 1905; no. 249). 
Among Utricularia, near Entebbe (1 May, 1905 ; no. 620). 
Some of the coenobia were very large, up to 54 р in length (coenob. of 
4 cells); length of cells 42 р. The variety was originally described from 
Madagascar. 
Var. OPOLIENSIS, (Richt.) И’. & G. S. West, т Trans. Linn. Soc. ser. 2, 
Bot. vi. (1902) p. 197, t. 17. figs. 16, 17.—S. opoliensis, Richter, 1895. 
Tanganyika.—Abundant in swamp, Mbete (28 Sept. 1904 ; по. 108). 
