Ser. RHopOSPERMEA. Fam. Ceramiea. 
Pratt CCXCVII. 
CALLITHAMNION SPARSUM, Zar. 
Gen. Cuar. Frond rosy or brownish-red, filamentous; stem either opake 
and cellular, or translucent and jointed; branches jointed, one-tubed, 
mostly pinnate (rarely dichotomous or irregular); dissepiments hyaline. 
Fruit of two kinds on distinct plants: 1, external ¢etraspores scattered 
along the ultimate branchlets, or borne on little pedicels; 2, roundish 
or lobed, berry-like receptacles (favelle) seated on the main branches, 
and containing numerous angular spores. CattirHamNion (Lyngé.), 
—from xaddos, deauty, and apnov, a little shrub. 
CALLITHAMNION sparsum; parasitical, minute; filaments tufted, scattered, 
sparingly branched ; branches spreading, unequal ; articulations twice 
or thrice as long as broad;  tetraspores “obovate, sessile, mostly 
axillary.” (Carm.) 
CALLITHAMNION sparsum, Harv. in Hook. Br. Fl. vol. ii. p. 348. Harv. Man. 
ed.2.p.184. <Kiitz. Sp. Alg.p. 643. 
CALLITHAMNION floridulum, Lyngb. Hyd. Dan. p. 130. t. 41.(not of Phyc. Brit.) 
TRENTEPOHLIA sparsa, Harv. im Mack. Fl. Hib. part 3. p. 219. 
Has. On old stems of Laminaria saccharina at Appin, Capt. Carmichael. 
On Cladophora rupestris at Miltown Malbay, W.H.H. 
Grocer. Distr. Shores of Greenland, Gieseke. 
Dezscr. Fronds forming small, scattered tufts, one or two lines in height and as 
much in diameter, composed of erect, closely-set filaments. /i/aments nearly 
simple, or furnished with two or three simple, alternate or secund branches, 
equalling the main filament in diameter, cylindrical, obtuse. Articulations 
about once and a half as long as broad, with pellucid dissepiments. Teétra- 
spores (which I have not seen) “ obovate, sessile, mostly axillary.” (Carm.) 
Substance membranaceous. Colour a clear crimson-red. 
A minute and little known, but perhaps not uncommon species, 
in many respects allied to C. Daviesii, and in some approaching 
C. Rothii, but differing from both in the very simple filaments 
and flexuous branches. J have made my drawing from a part of 
Captain Carmichael’s original specimen, preferring to use, in this 
VOL. IL. Q 
