THE NATURAL HISTORY REVIEW. 137 
thickly studded with a Caulerpa (C. letevirens, Mont.?) with short stems, 
clothed with brilliant club-shaped leaves, resembling miniature clusters of 
grapes. At every few yards, deep, basin-like hollows, of greater or lesser 
size, break the surface of the reef, and afford well-sheltered nooks for a 
variety of beautiful Algee. The water in these basins is always intensely 
transparent ; the bottom frequently of white sand ; and the steep and craggy 
sides clothed with Algze vegetation, in which the brightest tints of green, 
purple, carmine, and olive, and the most graceful waving forms, are 
mingled in rich variety. Here is the favourite locality of some eight or 
ten species of Caulerpa, of several very distinct forms, and every one a 
beautiful object. All these are green; but the tints vary from the darkest 
bottle-green to the pale, fresh green of an opening deech leaf. Some re- 
semble soft ostrich feathers; others, branches of the Norfolk Island pine ; 
others, strings of beads; others, squirrels or cats’ tails; and C. scapelli- 
forms is like a double saw. Under the shelter of the Caulerpe the smaller 
Rhodosperms (such as Dasye and Callithamnia) are often found. But these 
are most numerous on the perpendicular sides of the border reefs, where 
also rich meadows of Caulerpe are seen waving in the clear water, from a 
foot beneath the surface to a considerable depth. Various Fwcoidee and 
Ecklonia radiata ave scattered here and there through the deeper pools, 
and on the sides of the reef. None of these are ever left dry at low water. 
In many places a profusion of a Bryopsis (B. australis) enlivens the rocks 
with its silky tufts of green, each tuft separate from its neighbour. Some 
of the shallower reefs near high-water mark are partially covered with 
sand; and this is the habitat of Penicillus arbuscula, a little green Alga, 
which may be compared either to a miniature tree or to a shaving-brush. 
Struvea plumosa abounds on all the reefs, at about half-tide level, gene- 
rally growing on the very edges of the rock-pools and border reefs. I 
obtained from Mr. Stanford, Colonial Secretary, a specimen of a new 
Struvea, sent by Mrs. Drummond from Champion Bay, differing from S. 
plumosa in its vastly larger size and more compound network. The spe- 
cimen has been bleached white, and in this state strongly resembles a 
beautiful pattern of old point-lace, and might be made into ladies’ collars, 
as it is of a tough substance. 
The Catalogue contains 352 species, of which 277 appear pecu- 
liar to the Australasian flora, and 75 either to pelagic species, or 
to more or less distant botanical regions; these may be grouped 
as follows :— 

Whole number collected. Australian. 
Ser ie-—-NMelanospermess af iu aie. seta 4 0 
pie Whodaspermer yar) ee eh a a 1G 
PaO ni Grospermieres en. bern ett BOE, ie pie 8D 
352 277 
N. S. VOL. I. fh 
