196 CAPE ALG^. corymbosis, ad apicem attenuatis, axi primario inferne plus minus corticato, cellulis 150-170 fi latis. Oellulis ramulorum inferne diametro 2-3plo longioribus, superne sensim brevioribus. Sphsero- sporangiis sporas plurimas continentibus, sessilibus, interiore latere pinnularum juxta basim secundatis. Cystocarpiis terminalibus, bi- lobatis, carposporis nullo ordine dispositis, foventibus. Antlieridiis glomerulos hemisphaericos, sessiles in ramulis superioribus secun- datim dispositis formantibus. Hab. in thallo OigartincB Radula epiphyticum. Ad Cap. bon. Spei, a W. Tyson com. Pleonosporitjm Tysoni. Antheridia, x 170. Pleonosporium Tysoni. Tetrasporangium, x 170. An examination of the cystocarp, which I had not seen at the time my list of Cape Algae was published, has convinced me that the plant should be referred to the genus Pleonosporium rather than to Aristothamnion. In the above revised diagnosis I have been able to add several important points to my former description. Cryptonemia ? CAPENSis Schm. Port Alfred, Carr ! Slavin ! Glaphrymenia porphyroidea Schm. Cape, Becker ! Aeodes orhitosa Schm. {= Iridaa orhitosa Suhr). Cape, Dregel Harvey ! A. ulvoidea Schm. Natal coast, Becker ! Thamnoclonium natalense J. Ag. Kowie, Becker ! GiGARTiNA cHONDRus Aresch. Gsii^e,Jide Grunow, Spyridia squalida J. Ag. Kowie, Becker ! S. cupressina Harv. Port Elizabeth, Farquhar ! Kowie, Becker Thysanocladia afrlcana Schm . ( = Gelidium serratum Kiitz . ) . Port Elizabeth, Farquhar ! The plant recorded in my list as T. coriacea Harv. is Ptilophora pinnatijida J. Ag., under which name it is recorded below. Hymenocladia kalymenioides mihi (= Microccelia kalymenioides Holmes). Port Alfred, SZavm ! Kowie, J5^c/<;^r! Under this name I place the plant previously recorded as H. polymorpha J. Ag. Prof. Schmitz pointed out to me that it was a new species of Hymeno- cladia, but, before it was published, a plant was described by Mr. Holmes as Microccelia kalymenioides in Annals of Bot. vol. viii. p. 339 (Sept. 1894). Mr. Holmes there states that it is the opinion of Prof. Schmitz that his plant belongs to Hymenocladia
