196 MR. G. S. WEST ON THE FRESHWATER ALG 
314. CosMARIUM zoxaARIUM, W. у G. S. West, in Trans. Linn. Soc. ser. 2, 
Bot. v. (1895) p. 71, t. 8. fig. 13. 
Long. 74 ш; lat. 49 ш; lat. isthm. 45 р. 
Tanganyika.—In swamp, Kituta (23 Aug. 1904; no. 72). 
This species has only previously been recorded from Madagascar. 
875. CosMARIUM Subcucumis, Schmidle, in Ber. Naturf. Ges. Freiberg i. D. 
vii. Heft 1 (1893), p. 98, t. 4. fips. 20-22. 
Long. 80 ш ; lat. 47 р; lat. isthm. 21 y. 
Victoria Nyanza.—In swamp, Bukoba (20 Apr. 1905; no. 251). 
PROTOCOCCACEZE (AUTOSPORACEE ). 
376. SORASTRUM SPINULOSUM, Näy. Gatt. einzell. Alg. (1849) p. 99, t. 5 p. 
Tanganyika.—In swamp, Kituta (23 Aug. 1904 ; no. 72). 
SCYTONEMACEZ. 
377. SCYTONEMA COACTILE, Montagne, in Kiti. Sp. Alg. (1849) p. 805; 
Rabenh. Fl. Europ. Alg. ii. (1865) p. 280; Born. у Flah in Ann. Sei. Nat., 
ser. 7, Dot. v. (1887) p. 90. 
Crass. fil. 16:5-20 ш; crass. trich. 11-12 ш; long. heterocyst. 14°5-20 џи, 
lat. 10-115 p. 
Spore quadratze, angulis levissime rotundatis; episporio glabro; long. et 
lat. 14 yu. 
Nyasa.—In swamp, Karonga (2 July, 1904; nos. 33 and 34). 
The filaments and pseudo-rami were elongated and flexuose. The strong 
hyaline sheaths, which were turning yellow or yellow-brown in the older 
portions, were firm and slightly lamellose. The cells were subquadrate, 
sometimes a little longer than the diameter, of a bright blue-green colour, 
and often contained a few large granules of much deeper colour. 
Some filaments were noticed with mature spores. They were seriate, as 
many аз 40 occurring in a chain, and in form were quadrate with slightly 
rounded angles. Each spore had arisen from a single vegetative cell and 
possessed a smooth straw-coloured epispore. Dorzi (in N. Giornale Dot. Ital. 
xi. 1879, p. 368) has described the occurrence of globose or ellipsoid spores in 
this genus, but those observed in 5. coactile were all quadrate and reminded 
one very forcibly of the seriate spores of species of Hapalosiphon. 
CHROOCOCCACEZE. 
878. ASTEROCYSTIS AFRICANA, sp. n. 
Plante minute et epiphytiez ; filis brevibus, vaginatis, subdichotome 
ramosis, ramis late patentibus, e serie singula cellularum formatis; vaginis 
latis et hyalinis; cellulis oblongo-quadratis vel oblongis, diametro usque ad 
