Holmes . — New Marine Algae. 341 
latis obtusis totam frondem supra basim dense distiche ■ obte- 
gentibus , cruciatim divisae , in strato cor tic ale immersae. 
Myriophylla Beckeriana, n. sp. 
Fronde bipedali longa , ad duas line as lata cylindraceo - 
compressa , irregulariter et distanter dichotoma apice at tenu at a, 
phyllis sphaerosporiferis per totam longitudinem ramorum 
distiche vestitis. 
Hab. Near the mouth of the Kowie River, Dr. H. Becker. 
This remarkable plant has a habit peculiarly its own. From 
the beginning of the branching of the frond it is densely fringed 
on the two sides with minute leaflets, bearing tetraspores. 
These are not, as in Delesseria , borne on a denuded midrib, 
but at the edge of the frond as in Carpoblepharis , and are filled 
with a delicate tissue of large thin-walled cells. The cysto- 
carpic fruit is hitherto unknown, and the exact position the 
genus should occupy cannot therefore be at present ascertained. 
In structure the frond approaches the species of Chrysymenia , 
in which the frond is solid, and the plant may provisionally be 
placed in the Rhodymeniaceae between Chrysymenia and 
Cordylecladia . 
Since writing the above description we have heard from 
Professor Schmitz of Greifswald, that he has also received the 
same plant from Dr. Becker, with the cystocarpic fructification 
upon it, and he is of opinion that it should be referred to 
Chrysymenia and to the section Botryoclada , to which belong 
C. uvaria and C. obovata. On the other hand we have the 
opinion of Professor Agardh, who has, however, examined the 
tetraspore-bearing plant only, that the plant, although allied 
to Chrysymenia , should form a separate genus. Certainly the 
structure and consistence of the frond and the shape of the 
tetraspores are different from those of the Botryoclada section, 
and the leaflets bearing the fructification are not arranged in 
a spiral manner, but distichously, so that the plant bears 
a singular resemblance in habit to Suhria vittata , although 
quite different in consistence, which is that of the CryptaracJine 
group of Chrysymenia. In Myriophylla the large cells are 
