OF THE THIRD TANGANYIKA EXPEDITION. 119 
86. CosMARIUM SEXANGULARE, Lund. in Act. R. Soc. Sci. Upsal. ser. 3, 
viii. (1871) p. 35, t. 2. fig. 23. 
Forma minimum, Nordst. in Bot. Notiser (1887), p. 162; т К. Sr. Vet.- Akad. 
Папі. xxii. (1888) по. 8, p. 60, t. 7. fig. Z6. 
Long. 13:5 ш; lat. 11:5 ш; lat. isthm. 3 ш; lat. арт. 6 р. 
Nyasa.—In swamp, Karonga (2 July, 1904 ; no. 34). Among Utricularia, 
Domira Bay (19 June, 1904 ; no. 579). 
Tanganyika.—In swamp, Kituta (26 Aug. 1904 ; no. 80). 
87. Cosmarium ABRUPTUM, Lund. tom. cit. p. 43, t. 2. fig. 22. 
Var. GRANULATUM, W. & G. S. West, in Trans. Linn. Soc. ser. 2, Bot. v. 
(1895) p. 65, t. 7. fig. 82. 
Victoria Nyanza.—A mong Utricularia, near Entebbe (1 May, 1905; no. 620). 
88. COSMARIUM Мехканихи, Breb. in Ralfs, Brit. Desm. (1848) p. 96, 
t. 15. fig. 6. 
Forma ОСТАХОСТАВЕ, Wille, in. Ofvers. К. Vet.-Akad. Fórh. (1879) no. 5, 
p. 43, t. 12. fig. 35. 
Nyasa.—In swamp, Karonga (2 July, 1904 ; no. 33). 
Victoria Nyanza.—In swampy pools, Bukoba (20 Apr. 1905 ; no. 251), 
89. COSMARIUM ANGULOSUM, Bréb, in Мет. Soc. Sci. Nat. Сет. iv. (1856) 
p. 127, t. 1. fig. 17. 
Nyasa.—Among Algw on shore, Domira Bay (19 June, 1904 ; по. 17). 
In swamp, Kota Kota (20 June, 1904 ; no. 18). 
Victoria Nyanza.—Among Utricularia, near Entebbe (1 May, 1905; 
no. 620). 
Var. сохотумом, (Rabenh.) W. & G. S. West, in Bot. Tidsskr. xxiv. (1901) 
р. 91.—Cosmarium concinnum, Feinsch. 
Victoria Nyanza.—In swampy pool near Bukoba (20 Apr. 1905 ; no. 618). 
Among Utricularia, near Entebbe (1 May, 1905 ; no. 620). 
Tanganyika.—In swamp, Kituta (23 Aug. 1904 ; no. 72). 
90. CosMARIUM Lave, Rabenh. Fl. Europ. Alg. Ш. (1868) p. 161; G.S. 
West, in Journ. Linn. Soc., Bot. xxvii. (1899) p. 386, t. 10. figs. 1-6. 
Nyasa.—Among Alg:e on shore, Domira Bay (19 June, 1904; no. 17). 
Victoria Nyanza.—Among Utricularia, near Entebbe (1 May, 1905; no. 620? 
Var. minimum, W. & G. 8. West, in Journ. Bot. xxxv. (1897) p. 119. 
t. 368. fig. 6. 
Nyasa.—Swampy lake margin, Domira Bay (19 June, 1904 ; no. 579). 
91. CosMARIUM CUNNINGTONH, sp. п. (Pl. 7. fig. 7.) 
C. parvum, circiter 11-plo longius quam latius, profundissime constrictum, 
sinu angustissimo-lineari extremo paullo ampliato ; semicellule pyramidatze 
(vel pyramidato-subtrapeziformes), angulis basalibus truncato-rectangularibus 
