CONFERVACEiE. 
75 
4. Cladophora cartilaginea * Rupt.; tufts ? filaments robust, setaceous 
elongate, firm, somewhat rigid, rather sparingly branched ; branches very erect, scattered 
long and virgate, undivided, straight, set with a few scattered, erecto-patent, filif orm 
branchlets, which are either naked or bear one or two minute ramuli ; articulations in 
the older parts much shorter than their diameter ; in the younger (towards the ends of 
the branches) as long, or twice as long as broad. Rup. Alg. Ochotzk, p. 211, (403.) 
Hab. Unalaschka, Dr. Ruprecht. (v. s. in Herb. T.C.D.) 
My only specimen is a fragment, but it seems to belong to a well characterised species 
of large size. The portion before me is about four inches long, with a few lateral 
virgate branches, set at very acute angles, quite simple, straight and three inches long) 
furnished with several scattered, simple, erect ramuli, each of them from half an inch to 
an inch in length, obtuse, nearly as thick as the stem from which they spring. These 
are mostly naked, but in a few cases they bear a minute ramulus near the tip. The 
apices are not attenuated. The diameter of the filament is equal to that of hogs’ bristle. 
The substance is firm and cartilaginous, and the colour a pale-green. Through the 
greater part of the filament the articulations are much shorter than their diameter ; 
but towards the apices they are longer, and the few terminal joints are twice as long as 
broad, or more. 
*** Arctje. Filaments soft, forming dense, spongy, fastigiate tufts of a pale, but 
vivid green. 
5. Cladophora arcta , Dillw. ; tufts dense, more or less matted at the base, starry, 
fastigiate, soft, brilliant and glossy green ; filaments capillary, much branched ; branches 
straight, crowded, very erect ; ramuli opposite or scattered, erect or appressed ; articu- 
lations in the lower part of the frond about twice as long as broad, in the upper (younger) 
branches many times longer than the diameter ; apices obtuse. Dillw. Conf. Supp . 
p. 67, t. E. E. Bot. t. 2098. Harv. Phyc. Brit. t. 135. C. arcta , vauchericeformis , 
and centralis, Auct. C. scopceformis, Rup. 
Hab. Coasts, from the Arctic Regions to New York Bay, on rocks near low water 
mark. Whalefish Islands, Davis’s Straits, Dr. Lyall. Prince Edward’s Island, Dr. Jeans. 
Penobscot Bay, Dr. Young. Boston Harbour, Mr. G. B. Emerson. New York Bay, 
Messrs. Walters , (Sfc., W. H. H. (v. v.) 
* Besides this species Dr. Ruprecht notices the following from Russian America : — C. adhcerens, Rup. from 
the Arctic Sea, allied to G. arcta (if it be different) ; 0. Chamissonis, Rup. from Unalaschka ; C. Mertensii, R. 
from Sitcha ; C. viminea, Rup. from Sitcha and Unalaschka ; C. scopceformis, and C. coalita, from Northern 
California. Of these Dr. Ruprecht has sent me fragments of C. Chamissonis, C. viminea, and C. coalita ; but as 
he has not, that I am aware of, assigned full specific diagnoses to Any of the above species, I am unwilling to 
describe the few that I possess, from the very imperfect materials at my command, lest I might add to the 
confusion already sufficiently confounded in this genus. I collect the above names from Dr. Ruprecht’s Alg. 
Ochotsk., as already quoted. 
