86 
CONFERYACEiE. 
3 CiitETOMORPHA cerea , Dillw. ; root scutate ; filaments setaceous, tufted, straight, 
(sometimes twisted in age) harsh and brittle, yellow-green ; articulations about as long 
as broad. Dillw. Conf. t. 80. E. Bot. t. 1929. Lynb. Hyd. Dan. t. 51. Ay. Syst. 
p. 100. Wyatt , Alg. Damn. No. 191. Harv. Phyc. Brit. t. 99- B. Kiitz. Sp. Alg. 
p. 379. 
Hab. In rock pools, between tide marks, &c. Newport, Professor Bailey. New 
York Bay, Messrs. Hooper , Walters , fyc. (v. v.) 
Filaments generally in dense tufts, 3-12 inches in length, and as thick as hog’s 
bristle, rather harsh to the touch when fresh, but much less rigid than C. melagonium, 
and collapsing on being removed from the water, usually straight, but old specimens are 
sometimes crisped and contorted. The colour when growing is a beautiful yellowish 
green, but dried specimens are usually much faded, and dull-greenish white after long 
keeping in the Herbarium. The endochrome fills the cell and is of a watery consistence, 
and dispersed in drying. The articulations are pretty uniformly as long as broad, with 
contracted dissepiments. 
4. CniETOMORPHA Olneyi , Harv. ; filaments tufted, setaceous, straight or curved, soft, 
pale-green ; articulations once and half as long as broad. (Tab. XLVI. I).) 
Hab. Rhode Island, Mr. Olney. (v. s. in Herb. T.C.D.) 
This has the habit of C. cerea , but is of a soft and flaccid substance, adhering closely 
to paper in drying. When dry it is very pale, greenish white, and without gloss. 
The filaments are about the same diameter as those of C. cerea ; the articulations are 
longer, and the cell-wall thicker. 
Plate XLYI. D. Fig. 1. Ch^etomorpha Olneyi , the natural size. Fig. 2. a portion 
magnified. 
5. Chjetomorpha longiarticulata , Harv. ; filaments capillary, curved, loosely bundled 
together, flaccid, soft, pale green ; articulations 4-6 times as long as broad, swollen at 
the nodes. (Tab. XLYI. E.) Yar. /3. crassior ; filaments more robust. 
Hab. In rock pools, between tide marks. Ship Anne Point, Mr. Hooper. Boston 
Bay, Mrs. Asa Gray. Little Compton, Mr. Olney . Yar. /3, in brackish ditches at 
Little Compton, Mr. Olney. 
Filaments rather more slender than human hair, 3-4 inches long, loosely bundled 
together, and somewhat stratified. Articulations filled with very pale endochrome, 
almost hyaline when dry, several times longer than their diameter, nodoso-incrassate at 
one or both ends, with contracted dissepiments. The cell-wall is very thin and mem- 
branous. 
