tomous, and each ramification tipped with a minute cellule or mucro. The 
branches, pinne, and pinnules are all opaque, being corticated with a layer 
of cellules, which is thickest in the oldest parts. Fuwvelle unknown. Tetra- 
spores globose, sessile near the tips of the ramelli. Colour a full, deep red. 
Substance rather cartilaginous, soft, but not sensibly gelatinous. In drying, 
the frond adheres closely to paper. 
ems 
Though as yet I have only seen a solitary specimen of this 
Alga, I venture to consider it as the type of a new species, nearly 
allied indeed to C. Agardhiana (Plate CCLVI.), but differing 
greatly in ramification and general habit, and more critically dis- 
tinguishable by the mucronate apices of the ramelli. Like C. 
Agardhiana, we have here a species with an opaque, corticated 
axis, presenting all other characters proper to Crowania; in the 
present species only the ¢e¢raspores are known, and in C. Agar- 
dhiana only the favelle ; thus, if these two species may be re- 
garded as congeners, one supplements the other in its fructifi- 
cation. 
I am glad to have this opportunity, before closing the ‘ Phy- 
cologia,’ again to express my obligations to Mr. Henry Watts, 
of Warnamboul, the discoverer of this pretty little plant, for a 
considerable number of the rarer Algz of that shore, communi- 
cated to me at intervals during the last three or four years. 
Fig. 1. Crovanta Wartsit,—the natural size. 2. One of the pinnules, whorled 
with ramelli. 3. Cross-section of the pinnule, through one of the whorls. 
4. Part of aramellus. 5. A tetraspore from the same. 6. Cross-section 
of a branch :—variously magnified. 
