194 CAPE ALG^. C. Lindenhergii Bind. Port Elizabeth, Farquhar Cape Morgan, Flanagan ! Kowie, Becker ! C. MUCRONATUM J. Ag. Sea Point, Boodle Weber van Bosse I Cape, Scott Elliot ! C. ADH.ERENS Ag. Kuysna, Newdigate ! Port Elizabeth, Farquhar ! The specimens of this alga, which have been sent by Miss Newdi- gate, preserved in spirit, are only attached to the substratum at the centre of the thallus, and the rest of the flat frond is free, though prostrate. It was suggested to me that this was a new- species of Codium, but since in the same sending I find plants in which the thallus entirely adheres to the substratum, I believe that all the specimens are but forms of C. adherens ; the more so that all of them exhibit the clavate exterior cells with the very long cylindrical filaments below, found in C. adlmrens. Prof. J. G. Agardh, in his Till Algernes Systematik, pt. viii. p. 37, in speaking of this species, says, ** lobis demum a rupibus plus minus solutis," showing that the unattached lobes in C. adhcerens are not unknown. PsEUDOcoDiuM Devriesii Web. van Bosse, ined. Isipingo, Natal, Weber van Bosse ! Kei Mouth, Flanagan ! PHiEOPHYCEiE. Haliseris ligulata Suhr. Port Alfred, West ! Kowie, Becker ! Stilophora rhizodes J. Ag. Hagahaga Mouth, Flanagan ! Streblonema Codii, n. sp. Fills primariis repentibus, ramosis, usque ad 18 /x latis, intra cellulas hospitis profunde penetrantibus, articulos irregulares prse- bentibus. Fihs secundariis erectis, circa et supra cellulas hospitis emergentibus, fasciculate ramosis, 8-10 /x latis, spo- rangiis plurilocularibus, pedicellatis, sub- cylindraceis, apice attenuatis, in media parte transverse 4 -seriatim locellatis. Hab. in thallo Codii adharentis macu- las magnas formantibus, ad Knysna, Cap. bon. Spei. Coll.: C. Newdigate. Streblonema Codii, x 170. This species appears to be rather uncommon, since of all the plants of Codium adlmrens which I have seen from the Cape, Streblonema Codii grows on only a few, which were sent me by Miss Newdigate, of Forest Hall, Knysna. On these it grows in large, dark patches, spreading over the surface. In some points S. Codii resembles M. Sauvageau's new genus Strepsithalia, but it differs from it in the number of transverse loculi of the plurilocular sporangia, Strepsithalia having uniseriate loculi, and this plant having four in the thickest part of the sporangium. A resemblance between S, Codii and Ectocarjms (Streblonema) StilophorcB Crouan, var. ccespitosa Rosenv. has been pointed out, but the same difference in the plurilocular sporangia applies here as in the case of Strepsithalia,
