193 CAPE ALG^. By Ethel S. Barton. Since publishing the Provisional List of the Marine Algae of the Cape of Good Hope in the Journal of Botany for 1893, much work has been done by collectors in that region. Many of these, notably Mr. Tyson, Miss Newdigate, Mr. Flanagan, Mr. Slavin, and Mr. Maurice Evans, have sent plants of interest to the British Museum, and Dr. Becker has also sent collections to the same Institution, to the late Prof. Schmitz of Greifswald, and to Mr. Holmes ; so that the South African area bids fair to be well explored. I propose, therefore, to publish by degrees a revision of my previous Cape List, with the additions which have been made to the Flora since 1893, and to add critical notes to such species as appear of doubtful authenticity or require further investigation. In this revision I hope to have the assistance and co-operation of my friend Mrs. Weber van Bosse, who spent some months in South Africa in 1894, and brought back a collection of Algae from various parts of the coast. The revision will contain as far as possible all fresh records of plants ranging from Walfisch Bay to Natal, and, later on, the coast-line will be divided up into areas determined by the tempe- rature of the water, and these areas compared with each other and with other parts of the world. Our knowledge of the Corallinm of South Africa is in the same unsatisfactory state as it has ever been, since it is impossible to work out this group at a distance from the growing plants. I must here record my grateful thanks to Major Reinbold for his never-failing kindness in sending me many speci- mens for comparison, and to Mr. Batters for advice and help on critical points. Species not included in my previous list are here printed in capitals. Protophyce^e. Lyngbya JESTUARU Licbman. Cape, Harvey ! L. MAjuscDLA Harv. Kei Mouth, Flanagan ! Calothrix JERUGiNEA Thur. Cape Morgan, Flanagan 1 Chlorophyce^. Enteromorpha rhacodes Holmes. Mouth of Kowie River, Becker ! Letterstedtia insignis Aresch. Port Elizabeth, Weber van Bosse ! Port Alfred, Slavin I Kowie, Becker ! Urospora penicilliformis Aresch. Kalk Bay, Boodle I on Cha- tangium saccatum. Cladophora catenifera Kiitz. ( = Conferva radiosa Suhr). Algoa Bay, Suhr ! Port Alfred, Slavin ! Cape Morgan, Danvers ! Udotea Desfontainesii Dene. Natal, Evans ! Caulerpa plumaris Ag. Kowie River, Tobias ! Cape Morgan, Flanagan ! 0. BARTONiiE Murr. British Kaffraria, Flanagan ! CoDiuM Bursa Ag. Natal, Evans ! Journal of Botany. — Vol. 34. [May, 1896.] o
