877 ALG^ FROM CENTRAL AFRICA. By W. West, F.L.S., and G. S. West, A.R.C.S. (Plate 361.) The small collection of Algae wbich forms the subject of this paper was made by Dr. J. W. Gregory during the expedition to Mount Kenya in 1893. The gatherings were not very rich, but proved to be most interesting ; they were as follows : — 1. Inkuyuni, Kamassia (from rocks in river). Camp no. 63, Coll. no. xxiv. 30th May, 1893. 2. Lake Losuguta (water with sulphides). Camp no. 51, Coll. no. XXV. 16th May, 1893. 3. Lake Baringo (mud with diatoms). Coll. no. xxx. May, 1893. 4. G. Laschan, Leikipia. Camp no. 71, Coll. no. xxxviii. June 13th, 1893. 5. Mwangadan River, S. of Fuladoga. The last one consisted of a mass of dried algae in paper, and on soaking out yielded many species. Of the other four, which were in tubes, no. 4 was the only one which was not thoroughly dry, the corks of the others being almost entirely demolished by beetles. From no. 5 several zygospores of a desmid were seen (diam. c. spin. 43 [x), but, as no semicells were attached to them, these could not be determined. (Edogoniace^. 1. (Edogonium sp. Crass, cell, veget. 6-5-7'5 /x; longit. 5-6-plo major. Mwangadan River, S. of Fuladoga. 2. (E. sp. Crass, cell, veget. 13'5-15/a; longit. 2^-4-plo major. G. Laschan, Leikipia. CONFERVACEJE. 3. Cladophora crispata (Roth) Kiitz. Phyc. Gener. 264 ; Wolle, Freshw. Alg. U. S. 126, pi. cix. f. 4-10 ; Cooke, Brit. Freshw. Alq, 143, pi. 55, f. 3. Crass, fil. 29-42 /x. Mwangadan River, S. of Fuladoga. Ulotrichace^. 4. HoRMisciA suBTiLis (Kiitz.) De Toni, 8yll. Algar. 159. Ulothrix subtilis Kiitz. Phyc. German. 197; Rabh. Flor. Europ. Alg. iii. 365. Var. VARIABILIS (Kiitz.) Kirchn. Alg, Schles. 77. Ulothrix varia- bilis Kiitz. Species Algar. 346 ; Rabh. Fl. Europ. Alg. iii. 365. Crass, fil. 5-6 fx. Mwangadan River, S. of Fuladoga. Zygnemaoe^. 5. Spirogyra arcta (Ag.) Kiitz. Tab. Phyc. v. t. 21 ; Rabh. Fl. Eur. Alg. iii. 239. Forma cellulis fructiferis non inflatis. Crass, cell, veget. 34-38 /x ; longit. l|-plo major ; long, zygosp. 48-50 /x, lat. zygosp. 27 /x. Inkuyuni, Kamassia. 6. S. setiformis (Roth) Kiitz. Species Alg. 442 ; Rabh. Fl. Eur, Journal of Botany. — Vol. 34, [Sept, 1896.] 2 c
