84 
CONFERYACEiE. 
To this species I am disposed to refer a specimen which was provisionally named 
C. prasina , formerly received from Professor Bailey, who found it abundantly in the 
Hudson at West Point, where it is thrown ashore after storms. I have also received a 
fresh-water specimen collected by Dr. Bigelow when engaged on Lieutenant Whipple’s 
expedition to the Pacific. 
20. Cladophora glomerata , Linn. ; filaments tufted, bushy, somewhat rigid, much 
branched, bright grass-green ; branches crowded, irregular, erecto-patent, repeatedly 
divided ; ultimate ramuli secund, subfasciculate ; articulations 4-8 times as long as 
broad. Dillw. Conf. t. 13. E. Bot. t. 2192. Harv. Man. Ed. 1, p. 134. 
Hab. In streams, lakes, and rivers. Probably common. 
I have received North American specimens from Milton, Saratoga County, N.Y., and 
from Lake Erie ; also from the Mexican Boundary Surveying Expedition. 
IY. CHiETOMORPHA, Kiitz. (May, 1845.) 
Filaments (not gelatinous), membranaceous or cartilaginous, unbranched, attached, 
or floating, articulated ; formed of a string of oblong cells, the basal cell longer than 
the rest. Articulations filled with granular endochrome. (Marine.) 
The genus, as here adopted from Kiitzing, is intended to include most of the marine 
species of the older Conferva , which have unbranched filaments and articulations usually 
longer than their diameter. It differs from Cladophora solely in being branchless. 
F rom Hormotrichum it is less easy to point out a clear distinctive character, unless we 
seek it in the substance of the cell-coats, and in the shortness of the cells usual in that 
genus. The name Aplonema was proposed for this group by Mr. Hassall (Brit. Fr. 
W. Conf. p. 213.) only two months subsequently to the publication of Kutzing’s genus, 
which thus establishes its priority on very narrow evidence. It forms a part of the 
Agardhian Lychcete , published in 1846 ; a group that includes both simple and branched 
species, and which is thus characterised by its author : — 
LYCHiETE, J. Ag. ; “ fronde sub-heterogenea, articulo infimo (in simplicibus),aut infimis 
ramorum (in ramosis) dissimilibus et non mutandis, superioribus omnibus continua 
subdivisione iterum iterumque divisis atque coniocystis externis distinguendum.” 
Alg. Ined. Ed. 2, No, 9. ( Lychcete mirabilis). 
I prefer, with Kiitzing, to keep the branching and unbranehed species in separate 
genera, as being a more obvious, if not more natural arrangement. However, the 
whole subject of the natural arrangement of these obscure plants is open to future 
discussion. The present is but a temporary settlement of the question. 
