34 ° Holmes. — New Marine Algae. 
cortical layer. Professor Schmitz is of opinion that the plant 
belongs to the genus Hymenocladia , and has given it the 
MS. name of H. kowiensis. He states that he has seen the 
cystocarpic plant, but the specimen that he alludes to is not, 
I think, identical with M. kallymenioides. 
Pachymenia rugosa, n. sp. 
Fronde cartilagineo-carnosa , callo radicali crasso conico brevi 
oriunte , late expansa , undulata vel plicata , aetate corrugata ; 
colore coccineo-purpureo. Favellae infra stratum corticate 
intmersis , per frondem spar sis. 
Hab. Near the mouth of the Kowie River, Dr. H. Becker. 
The specimens received have a more or less denticulate or 
eroded margin, which appears to have been caused by mollusks, 
since in places the margin is entire, and where it is not so it has 
become double with a furrow between the two marginal lines. 
As in other species of this genus the nucleus of the cystocarp 
is surrounded by a flask-like arrangement of filaments, the 
mouth of the flask projecting slightly above the surface of the 
frond and thus forming the carpostome. The wrinkled char- 
acter of the frond does not however appear to be due to the 
presence of numerous carpostomata, but to irregular thickening 
of the tissues. The small cells, vertically arranged, forming 
the cortical layer, usually consist of about nine rows of 
moniliform coloured cells, those nearest the surface consist- 
ing of about three rows of minute cells. In the rugose 
portion this superficial layer is thicker. Professor Schmitz 
proposes to place this plant, which he identifies with Iridea 
cornea , Kiitz., Tab. Phyc. xvii. 23, in a new genus Cyrtymenia , 
together with Grateloupia hieroglyphic a. 
Myriophylla, nov. gen. 
Frons gelatinoso-carnosa , cylindraceo-compressa , stratis 
duobus contexta , interior e cellulis magnis oblongis pluriseriatis , 
cellulis minor ibus interstitiis replentibus , superficiem versus 
cellulis gradatifn minor ibus strato corticali tenui , celhdis 
minutis constituente . Sphaerosporae in phyllis minutis lanceo - 
