Apices blunt. Articulations of the pinnules twice or thrice as long as broad, 
cylindrical. Zavelle unknown. Tetraspores sessile, globose, solitary on the 
sides of the uppermost pinnules, just below the apex. Colowr a beautiful 
rose-red. Substance soft, but not gelatinous. It soon decomposes in fresh 
water, giving out colour, and in drying most closely adheres to paper. 
enn 
A truly beautiful species, even in the section (that of C. ro- 
seum) of the beautiful genus to which it belongs. It is also 
among the rarer of the Victorian species, if I may judge from the 
few specimens I was myself able to secure, and from never ha- 
ving received it from Dr. Mueller, or any other of my liberal 
correspondents in Victoria. Its characters are so distinct, that 
there is little need to compare it with any other. The likeness 
which it bears to C. comosum is an external one merely, the 
microscopic characters being completely different, these species 
belonging, indeed, to different sections of the genus. From 
C. thuyoideum, C. gracillimum, and others of similar aspect, the 
opaque stem, coated with cells and rough with short spreading 
hairs, at once distinguishes it. 
Vig. 1. CaALLITHAMNION FORMOSUM,—+¢he natural size. 2. Apex of a branch, 
with lateral plumules. 3. Apex of a plumule, bearing ¢edraspores. 4, A 
pinnule and tetraspore. 5. Cross section of the stem. 6. Small portion 
of the stem :—magnified. 
