CONFERVACEiE. 
85 
1. CiIjETOMORPHA Piquotiana , Mont. ; filaments loosely bundled together in strata, 
very long, ultra- setaceous, grass-green, rigid, glossy and variagated when dry, variously 
twisted ; articulations 3--5 times as long as broad, contracted at the nodes. Mont. An. 
Sc. Mat. ‘SdSer.vol. 11, p. 66. Mont. Syll. p. 459. Kiitz. Sp. Alg. p. 379- Tab. 
Phyc. vol. 3, p. 19, t. 58,/. 2. (Tab. XLYI. C.) 
Hab. In deep water ; from 5 to 6 fathoms. Coast of Labrador, M. Lamar e-Piquot ! 
Burnt Coat Island, Maine, Dr. A. Young. Halifax, W. H. H. Boston Bay, Airs. 
A. Gray. Stateh Island, N.Y., Dr. Torrey. (v. v. ) 
This occurs in large bundled strata, the filaments lying loosely together, but probably 
they are attached at an early age. Filaments 12-14 inches long or more, twice as thick 
as hog’s bristle, crisp and rigid, variously curved and twisted, of a full grass-green 
colour, fading in drying, but retaining a glossy surface. The endochrome , in drying, 
is usually dispersed toward the ends of the cell, which gives the filament a variegated 
look, with alternate pale and dark bands. The cell membrane is thick and tough. The 
articulations are variable in length, but always much longer in proportion than those 
of C. melagonium. They are commonly four times as long as broad ; occasionally only 
thrice their breadth, and sometimes 5-6 times as long. The dissepiments or nodes are 
always much constricted and very narrow. The endochrome recovers its form when 
remoistened. It does not adhere to paper. 
I have compared my specimens with an original one communicated by Dr. Montagne. 
The species is nearly related to C. melagonium , but of larger dimensions and with 
much longer articulations. 
Plate XLVI. Fig. 1. Chjetomorpha Piquotiana , the natural size. Fig. 2, a 
magnified portion. 
2. CHjETOMORPHA melagonium , Web. and Mohr. ; root scutate ; filaments erect, 
straight, elongate, very robust, ultra-setaceous stiff and wiry, dark-green, tapering to 
the base, obtuse ; articulations 2-3 times as long as broad. Ag. Syst. p. 99. Lyngb. 
Hyd. Dan. t. 51. Harv. Phyc. Brit. t. 99. A. Wyatt, Alg. Danm. No. 221. Kiitz. 
Sp. Alg. p. 379- 
Hab. In rock pools near low water mark, and at a greater depth. Greenland, Worms- 
kiold. Halifax, W. H. H. Boston Bay, Mrs. Asa Gray. Newbury Port, Mr. Hooper. 
Unalaschka, Wosnessensky. (v. v.) 
Boot an expanded disc. Filaments either scattered, or somewhat tufted, 5-1 2 inches 
long, twice as thick as hog’s bristle, erect and stiff, peculiarly wiry to the feel when 
growing, straight or slightly curved, very blunt at the apex, and tapering to the base. 
Articulations rather longer in the American than in European specimens, but variable 
even in the same tuft ; once and a-half, twice, or thrice as long as broad, filled with 
dark-green endochrome and contracted at the dissepiments. 
