112 MR. Ө. Б. WEST ON THE FRESHWATER ALG 
Genus EUASTRUM, Ehrenb. 
51. Kuastrum sINUOSUM, Lenorm. ex Ralfs, Brit. Desm. (1848) p. 85; 
W. & G. S. West, Brit. Desm. ii. (1905) p. 20, t. 36. fig. 1. 
Victoria Nyanza.—In swampy pool near Bukoba (20 Apr. 1905; no. 618). 
52. Evastrum ANSATUM, Ralfs, l.c. t. 14. fig. 2. 
Victoria Nyanza.—In swampy pool near Bukoba (20 Apr. 1905 ; no. 251). 
53. EvasrRUM RosTRATUM, Ralfs, in Ann. Nat. Hist. xiv. (1844) p. 192; 
W. à G.S. West, Brit. Desm. ii. (1905) р. 35, t. 37. figs. 11-13. 
Long. 46 ш; lat. 27 р. 
Victoria Nyanza.—Among Utricularia, near Entebbe (1 May, 1905; 
no. 620). 
54. EvAsrTRUM PERsONATUM, W. & G. S. West, in Trans. Linn. Soc., 
ser. 2, Bot. v. (1895) p. 52, t. 6. fig. 19. 
Forma incisuris apicalibus leviter apertioribus, angulis basalibus semi- 
cellularum delicatissime bidenticulatis. 
Long. 48 р; lat. 32 р; lat. isthm. 9 ш; crass. 17 p. 
Nyasa.—In swamp, Kota Kota (20 June, 1904; no. 18). 
55. ЕГАЗТВОМ ELEGANS, (Bréb.) Kütz. Phyc. Germ. (1845) p. 135; W. $ 
(т. S. West, Brit. Desm. ii. (1905) p. 48, t. 38. figs. 16-21. 
Forma angulis basalibus semicellularum sursum divergentibus. 
Long. 31 ш ; lat. 20 р; lat. ізі, 6-5 p. 
Victoria Nyanza.— A mong Utricularia, near Entebbe (1 May,1905; no. 620), 
56. ErasrRUM BINALE, ( Титр.) Ehrenb. in Berlin. Monatsber. (1840) 
р. 208; W. & G. S. West, le. p. 51, t. 38. figs. 28, 29. 
Forma nrAxs, West, in Journ. Linn. Soc., Bot. xxix. (1892) p. 140, t. 20. 
fig. 14. 
Nyasa.— Among Algæ growing on stones, Domira Вау (19 June, 1904 ; 
no. 17). 
Var. sUBELOBATUM, West, l. с. р. 140, t. 20. fig. 15. 
Long. 214; lat. 16:5 ш; lat. із. 5 p. 
Nyasa.—In swamp, Kota Kota (20 June, 1904; no. 18). 
57. ЮСАБТЕСМ pENTICULATUM, (Airehn.) F. Gay, in Bull. Soc. Bot. Fr. 
xxxi (1884) p. 335.— E. binale, rar. denticulatum, Kirchn. Alg. Schles. 
(1878) p. 159. 
Tanganyika.—In plankton, Lofu River (5 Oct. 1904 ; поз. 123 and 124). 
58. EUASTRUM HYPOCHONDROIDES, И’, à G. S. West, in Trans. Linn. Soc., 
ser. 2, Bot. v. (1895) p. 49, t. 6. fig. 8. 
Victoria Nyanza.—Among Utricularia in sheltered bay near Entebbe 
(1 May, 1905; no. 620). 
