OF THE THIRD TANGANYIKA EXPEDITION. 115 
64. MIcRASTERIAS AMERICANA, ( Ehrenb.) Ralfs, Brit. Desm. (1848) p. 19 
И’. $ 4.5. West, Brit. Desm. ii. (1905) p. 117, t. 53. figs. 4, 5, t. 54. figs. 1-3 
Victoria Nyanza.—Among Utricularia in swampy pool, Bukoba (20 Apr 
1905; no. 618). 
Tanganyika.—In plankton, Lofu River (5 Oct. 1904; no. 124). 
Genus COSMARIUM, Corda. 
65. COSMARIUM OBSOLETUM, (/Jantzsch) Reinsch, Sp. Gen. АІ. (1867) 
р. 142, t. 22. D.I. figs. 1-4; W. § Ц. S. West, l. c. p. 133, t. 56. figs. 1-3. 
Nyasa.—In pools on the shore, Nkata Вау (23 June, 1904; no. 22). 
Victoria Nyanza.—In swampy pools near the shore, Bukoba (20 Apr. 1905; 
no. 251). 
Tanganyika.—In swamp, Kituta (23 Aug. 1904; no. 72. Also 26 Aug. 
1904 ; no. 80). 
66. Cosmartum LUNDELLII, Delp. in Мет. Accad. Sci. Torino, ser. 2, xxx. 
(1878) p. 13, t. 7. figs. 62-64.—C. subcirculare, W. В. Turn. in K. Sv. Vet.- 
Akad. Handl. xxv. (1893) no. 5, p. 52, t. 8. fig. 3, and t. 9. figs. 27, 37. 
Var. MADAGASCARIENSE, W. & G. S. West, in Trans. Linn. Soc. ser. 2, 
Dot. v. (1895) p. 55, t. 8. fig. 2. 
Long. 74 ш; lat. 67 ш ; lat. isthm. 29 д. 
Nyasa.—[In pools on the shore, Nkata Bay (23 June, 1904 ; no. 22). 
67. COSMARIUM SUBAURICULATUM, W. & G. S. West, l. c. p. 55, t. 6. fig. 31. 
Forma sinu non aperto. 
Long. 48-56 р; lai. sine spin. 46-54; lat. cum spin. 49-58 ш; lat. 
isthm. 27-30 y. 
Nyasa.—lIn pools on the shore, Nkata Bay (23 June, 1904; no. 22). 
Victoria Nyanza.—A mong Utricularia, near Entebbe (1 May, 1905; по. 620). 
This species has been recorded by Schmidle from the vicinity of Lake 
Nyasa (vide Engl. Bot. Jahrb. xxxii. (1903) p. 68, t. 1. fig. 24). It is now 
known to occur in Madagascar, Central Africa, Siam, and Central China. 
The Desmid described by Gutwinski from Java as C. suberosum (Gutw. in 
Bull. de l'Acad. Sci. Cracov., Nov. 1902, p. 592, t. 38. fig. 36) is identical with 
C. subauriculatum var. truncatum, W. & G. S. West, in Bot. Tidsskr. xxiv. 
(1901) p. 172, t. 2. fig. 20, described from the island of Koh Chang in the Gulf 
of Siam. 
68. CoSMARIUM FONTIGENUM, JVordst. in Wittr. § Nordst. Alg. Ezsic. 1878, 
по. 171; W. $ G. S. West, Brit. Desm. ii. (1905) p. 147, t. 59. figs. 16, 17. 
Long. 24:5 ; lat. 24:5 р; lat. isthm. 7 p. 
Nyasa.—Among Utricularia, Domira Bay (19 June, 1904 ; по. 579). 
12 
