CONFERVACEiE. 
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I do not know any species to which this is nearly related. It is much more robust 
than C. arenosa. The length of the joints and the swelling of the nodes distinguish it 
from C. litorea. 
Plate XLYI. E. Fig. 1. Ch^etomorpha longiarticulata ; the natural size. Fig. 2, 
a portion magnified. 
6. Chjetomorpha sutoria , Berk. ; filaments setaceous, elongate, flexuous, equal, pale 
or dark green ; articulations once and half as long as broad ; interstices pellucid. Berk. 
Gl. Alg. t. 14,/. 3. Harv. Fhyc. Brit. t. 150. B. Cli. rigida, Kiitz. Sp. Alg. p. 377. 
Hab. Floating in large masses at Stonington, Con., Prof. Bailey, (v. s.) 
This occurs, loosely bundled together in extensive floating masses or strata. Fila- 
ments as thick as hog’s bristle, several inches long, rigid and variously curved and 
twisted, pale-green, cylindrical. Articulations once and half as long as broad, at length 
bisected. Substance rigid. It scarcely adheres to paper in drying. 
Professor Bailey’s specimens chiefly differ from the British plant with which I have 
associated them in being of a paler colour, with less dense endochrome, and of rather 
softer substance. 
7. ChvETOMORPHA litorea , Harv. ; filaments capillary, rigid, crisp, forming loose, 
extensive, dull-green bundles ; articulations once and half as long as broad, here and 
there swollen in pairs and discoloured. Harv. Phyc. Brit. t. 333. C. linum , Alg. Damn. 
No. 220 (Excl. Syn.) C. tortuosa , var. crassior , Pup. Alg. Och. 
Hab. Sea-shores. Sitcha, Russian America, Wosnessensky. (v. s.) 
Filaments forming loosely interwoven, extensive, floating strata, or entangled among 
the branches of other Algae, capillary, several inches in length, and of a dull green 
colour. The articulations are once and a-half to twice as long as broad, cylindrical, 
not contracted at the nodes, and mostly uniform in the same filament ; but here and 
there a pair of longer cells occur, which are swollen towards their commissure, where 
the endochrome collects in a dark mass. In drying the endochrome is usually dispersed, 
and never recovers its form on being moistened. 
This has been sent to me by Dr. Ruprecht from Sitcha, under the name C. tortuosa , 
var. crassior. The filaments, however, are fully twice as robust as in C. tortuosa ; 
they are more rigid, and adhere less strongly to paper, and their endochrome is dissi- 
pated in drying. They agree pretty well with the C. litorea of British collections. 
8. Chaetomorpha bracliygona , Harv. ; filaments capillary, interwoven in strata, 
curved and twisted, rigid ; articulations either as long as, or much shorter than their 
