102 MR. G. S. WEST ON THE FRESHWATER ALGJE 
Forma FrorowrANa, (Kütz.) Rabenh. Fl. Europ. Ala. iii. (1868) p. 335. 
Crass. fil. prim. 80-102 р; crass. ram. 65-70 ш; crass. ramul. 25-32 д. 
Tanganyika.—Scraped from the bottom of Dr. Cunnington’s “dau” 
(24 Jan. 1905 ; no. 216). 
The branches of the first order were somewhat patent and subdichotomously 
branched ; those of the second order (ramuli) were short, often papilliform 
and unicellular, or even merely curved (subuncinate) outgrowths from the 
upper extremities of the cells of branches of the first order. 
13. CLADOPHORA CRISPATA, (Roth) Kütz. Phye. Gen. (1843) p. 264; Rabenh. 
l. c. p. 836 ; Cooke, Brit. Freshw. Alg. р. 143, t. 55. fig. 3. 
Tanganyika.—Growing on grass-stems close to the shore, Kituta Bay 
(23 Aug. 1904 ; no. 73). 
Forma parva, parce ramosa, articulis diametro 5-12-plo longioribus ; cytio- 
dermate crasso, distincte plicato-striato. 
Crass. fil. prim. 48-58 м; crass. ram. 23-21 р. 
Nyasa.—Dredged in three fathoms, growing on bivalve shells, Anchorage 
Bay (no. 11). 
Forma parva, rigida, parce ramosa, filis usque ad 2:5 em. longis. 
Cross. fil. prim. 95-104 р; crass. ram. 30-64 р. 
Victoria Nyanza.—Growing on rocks just below the water-level, Bukoba 
(17 Apr. 1905 ; no. 247). 
14. CLADOPHORA CANALICULARIS, (Roth) Kütz. Sp. Alg. (1849) p. 109 
Rabenh. 1. c. p. 842. 
Forma CAPITELLATA. 
Forma parva, usque ad 2 em. alta, ramosissima, ramis basi connatis; 
articulis diametro 4-8-plo longioribus, distincte capitellatis, ad genicula plus 
minusve constrictis. 
Crass. fil. prim. 26-84 р; crass. ram. 18-24 y. 
Nyasa.—On rocks at water-level, Deep Bay (25 June, 1904 ; no. 26). 
Tanganyika.—Scraped from the bottom of Dr. Cunnington’s * dau” (24 
Jan. 1905 ; no. 217). 
15. CLADOPHORA BRACHYSTELECHA, Вабетй. Alg. Sachs. no. 654 (1862); 
Fl. Europ. Alg. ii. (1868) p. 343. 
Fila usque ad 4 mm. alta, densissime radiata circa culmos vetustos pelagios, 
ramosissima; ramis divaricatis et intricatis; articulis diametro 5-11-plo 
longioribus. 
Crass. fil. prim. 50-64 ш; crass. ram. её ramul. 27-35 д. 
_ Tanganyika.—Thickly covering floating fragments of stems collected in the 
tow-nets off Niamkolo Island (29 July, 1904; no. 36). 
