CONFERVACE^. 87 



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 XLVI. E. Fig. 1. Ch^tomorpha 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. Phyc. Brit. t. 150. B. Ch. rigida, Kutz. 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 difier 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. Ch^tomorpha 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. Danm. 

 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 Algaei, 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. Ch^tomorpiia brachygona, Harv. ; filaments capillary, interwoven in strata, 

 curved and twisted, rigid ; articulations either as long as, or much shorter than their 



