CONFERV ACEiE. 
69 
TABLE OF THE NORTH AMERICAN GENERA, 
Sub-order 1 . ChjltophorEuE. Frond invested with gelatine. 
I. Ch^tophora. Numerous filaments combined into a gelatinous frond of definite 
form. 
II. Draparnaldia. Filaments separate, fasciculately ramulose. 
Sub-order 2. CONFERVEiE. Frond destitute of a gelatinous coating. 
III. Cladophora. Filaments tufted, erect, branched. 
IV. Ciletomorpha. Filaments unbrancbed, membranaceous, with a thin cell-wall. 
Y. Hormotrichum. Filaments unbranched, gelatino-membranaceous, with a thick 
cell-wall ; nodes constricted. 
VI. RnizocLONiUM. Filaments decumbent, spuriously branched, the branches few 
and rootlike.' 
I. CHiETOPHORA. Ag. 
Frond gelatinous, polymorphous, of definite form ; the gelatine tranversed by many 
filaments aggregated together and issuing from a common base. Filaments articulated, 
branched ; articulations of the branches nearly hyaline, those of the ramuli filled with 
green endochrome. Sporangia globose, attached to the ramuli. Zoospores formed in 
the articulations. (In fresh water.) 
The species form gelatinous masses, of definite or sub-indefinite form, attached to 
sticks, water-plants, or stones, in stagnant or running water. The gelatine is colourless, 
tolerably firm and tenacious, and when a portion is placed under the microscope is seen 
to be traversed in every part with slender, articulated, branching filaments, variously 
arranged. The filaments are dimorphous, that is, their main divisions are formed of 
differently shaped cells from those that compose the ramuli. The latter alone contain 
much endochrome. Fructification has, as yet, been seen only in very few species. In 
some stage of growth the terminal cell of the ramuli is tipped with a very long, hyaline 
bristle, whence the generic name, from x aLT V> a bristle , and fopeco, to bear. The two 
following species have been sent me from America ; both are common European plants. 
Probably several others occur in American waters. 
1. CHiETOPHORA endiviafolia, Ag. ; frond elongate, irregularly much branched ; 
branches linear, scattered, or fasciculate, very patent, dichotomous or pinnate, or 
secundly ramulose ; longitudinal filaments parallel, hyaline, or transversely banded, 
