Vawcheria] xii. vaucheriace^e (West). 363 



XII. VAUCHERIAOE^. 



1. VAUCHERIA DC. (1803). 



1. V. sessilis DO. Flor. Fr. ii. 63 (1805); Cooke, Brit. Freshw. 

 Alg. 123, t. 46, f. 1-20 and t. 48, f. 1-5 ; W. at G. S. West 

 in Journ. Bot. 1897, p. 235. 



Ectosperma sessilis Vauch. Hist. Conferv. 31, t. ii. f. 7 (1803). 



GoLXJNGO Alto. — In fossis exsicoatis adhuc humidis in Yarzea pone 

 domicilium Isidri ; Aug. and Sept. 1855. No. 132. Covers in Aug. and 

 Sept. all the half-dried-up ditches of the marshy plaip (Varsea). 



Var. monogyna w: et G. S. West in Journ. Bot. 1897, p. 235. 

 GrOLUKGO Alto. — Ad margines stagnorum rivi Cuango ; Aug. 1857. 

 No. 155. 



XIII. HYDROGASTRACEJ]:. 

 1. BOTRYDIUM Wallr. (1815). 



1. B. granulatum Grev. Alg. Brit. 196, t. xix. (1830); Cooke, 

 Brit. Freshw. Alg. 114, t. 45. 



Ulva grcmulata L. Sp. PI. 1633. Ilydrogastrumffrcmulatum Desv. 



Var. sequinoctiale W. et G. S. West in Journ. Bot. 1897, p. 235. 



LoANDA. — Non infrequens in territor. Loandensis terris humidis 

 argillaceo-arenosis, latis plagis imo urbis ipsins plateas etc. obtegens ; 

 mox post pluvias copiosas nascens, citoque tempore sicco disparens. 

 Ad fin. April 1854. No. 199. 



Very little could be made out from the specimens, which were on 

 dried mud, but a rough sketch made by Welwitsch accompanying them 

 was sufficiently characteristic of the genus. 



XIV. PALMELLACE^. 



1. CCELASTRUM Nag. (1849). 



1. C. robustiun Hantzsch in Rabenh. Alg. Europ. no. 1407 ; 

 Reinseh in Abhandl. Naturhist. Gesellsch. Niirnberg, Bd. 3, H. 2, 

 88 (1866) ; Schmidle in Berichte der Naturfors. Gesellsch. Freib. 

 79, t. ii. f. 11 (1893); W. et G. S. West in Journ. Bot. 1897, 

 p. 236. 



C. indicum W. B. Turn, in K. Sv. Vet.-Akad. Handl. Bd. 25, 

 no. 5, 161, t. XX. f. 11 (1893). 



LiBONGO. — Ad margines flum. Lifune ; Sept. 1858. No. 204. 



Var. confertum W. et G. S. West, I.e. 



LiBONGO. — Cum form. typ. No. 204- 



2. SORASTRUM Kutz. (1845). 



1. S. spinulosnm Nag. Gatt. einz. Alg. 99, t. v. D. (1849) ; W. 

 et G. S. West, I.e. 

 LiBONGO. — Ad margines flum. Lifune ; Sept. 1858. No. 204. 



