330 



NOTES ON FRESHWATER ALG^. 



Habitat in distr. Huilla a cl. Welwitsch anno 1859 collecta in 

 sylvis monfcanis liamidiusculis prope Lopollo ad cataractas sporadica 

 cum H. m. Dec, n. 4808; etiam in sylvis raris inter Mumpulla et 

 Neiie cum fr. m. Oct., n. 4809. 



Occasionally the pistil is hexamerous, and the filaments are 

 sometimes bent at the apex. 



The genus is related to Agauria DC, but stands apart by the 

 groupmg of its more numerous stamens, by the broader shape of its 

 corolla, and by the toothing of its foliage. 



The name is given in honour of Count Ficalho, Professor of Botany 

 and Director of the Botanical Garden of the Polytechnic School at 

 Lisbon, &c., my friend and fellow- worker on African plants. 



Explanation of Plate 390. — Ficalhoa laurifoUa. The principal figure is 

 reduced about one-half. Pig. 1, The flower with the bracteoles at its base and 

 with its short pedicel, enlarged about 6 diameters. 2. Inside view of spread-out 

 corolla, enlarged about 6 diameters. 3. A single stamen, enlarged about 

 18 diameters. 4. The ovary with the style and stigmas, enlarged about 

 6 diameters. 5. The dehisced capsule as seen from above, enlarged about 

 6 diameters. 



NOTES ON FRESHWATER ALG^. 



By W. West, F.L.S., and G. S. West, B.A., A.R.C.S. 



The following notes have been accumulating for some time ; 

 they are somewhat varied, consisting of descriptions of new species, 

 notes relating to distribution, critical remarks, &c. 



1. Sph^roplea annulina (Roth) Ag. In very fine condition 

 with ripe oospores. 



Hab. Urumi, Persia. 



2. Hormospora ordinata, sp. n. H. parvum ; cellulis parvis, 

 subremotis, late ellipticis et longitudinaliter dispositis, diametro 

 1-3-plo longioribus ; segmentis amplis, achrois. Long. cell. 7*5 ii\ 

 lat. cell. 5-8 /x ; crass, teg. 15 /x. 



Hab. Cam Fell, W. Yorkshire. 



The small size of the cells, their remoteness, and comparative 

 shortness sufficiently ditferentiate this species. The cell-contents 

 are bright green and very granulose. 



3. Zyginema (Zygogonium) Heydrichii Schmidle, Zur Entwickl. 

 Zygn. u. Calothrix, Flora, 1897, Bd. 84, Heft 2, 167-170, t. v. 

 f. 5-11. As we have previously remarked (Ann. Bot. xii. no. xlv. 

 Mar. 1898, 44, footnote), this species seems to be nothing more 

 than a laterally conjugated form of Zijgnema spontaiieum Nordst. 

 The vegetative cells and the zygospores are of the same dimensions, 

 and the latter are also marked with scrobiculations precisely in the 

 same way as those of Z. spontaneum. (Compare Schmidle, /. c. f. 11, 

 and West & G. S. West in Ann. Bot. xii. pi. v. f. 60, 61, 1898.) 



4. Gonatozygon sexspiniferum W. B. Turner in Journ. Roy. 

 Micr. Soc. 940, pi. xvi. f. 27, 1885. This plant is not a Desmid, 



