CONFERYACEjE. 
71 
towards all parts of the circumference, sending forth multifid coloured branches verti- 
cally and laterally. The articulations of the filaments are once, twice or thrice as long 
as their diameter in different parts, contracted at the dissepiments, and filled with bright 
green endochrome. In a young state the apices of the ramuli are prolonged into setae, 
or needleshaped, colourless acuminated cells, but these are deciduous in this and other 
species of the genus. Colour , a bright green. 
Possibly this species is only a small state of C. elegans. 
II. DRAPARNALDIA, Bory. 
Filaments separate, gelatinous, articulated, dimorphous ; the articulations of the 
stem and branches hyaline, transversely banded ; those of the ramuli filled with green 
endochrome. Zoospores formed in the articulations. ( In fresh water.) 
Very beautiful, and extremely gelatinous, bright green, filamentous, much branched 
Algse, found in clear wells and gentle streams. The structure of the filaments is similar 
to that of the filaments of the Choetophoroe ; and this genus merely differs from the 
preceding in its filaments being separate one from another, and not combined by means 
of gelatine into a compound frond. It therefore bears the same relation to Chcetophora 
that Vaucheria does to Codium. The name was bestowed by Bory de S. Vincent in 
honour of M. Draparnaud, a French naturalist. 
1. Drapaenaldia opposita , Ag.; frond vaguely much branched ; joints of the main 
filament as long as broad, or shorter ; pencils of ramuli mostly opposite, densely set, 
lanceolate-acuminate in outline, plumose, bi-tripinnate, the apices much attenuated. 
Ag. Syst. p. 59. Kiltz. Sp. Alg. 357. lyngb. Hyd. Dan. tab. 65, fig. A. Batra- 
chospermum Americanum , Schweinitz. 
Hab. In clear streams. New York, Professor Bailey. New Jersey, Mr. Jackson. 
(v. s.) 
Frond 2-3 inches long, gelatinous, capillary, irregularly much branched ; the branches 
patent, lateral, more or less divided, and set with lesser ramuli. Main filaments with 
short articulations, as long as their breadth or shorter, transversely banded. At every 
two or three nodes and sometimes at every node a pair of opposite penicillato-multifid 
ramuli are thrown off. These are bright green, ovato-lanceolate in outline, much 
acuminated and twice or thrice pinnate, their pinnules somewhat constricted at the nodes, 
and tapering at the apex into long, needle-like, hyaline points. Their cells are com- 
monly nucleated and filled with endochrome. 
Whether this be permanently distinguishable from D. glomerata is doubtful. It has 
externally the aspect of that species, but its microscopic characters are nearer those of 
D. plumosa. 
