Algae of Tasmania. 
57 
George Town, V. D. Land, R. Gunn, Esq., n. 1299, 1300.— 
Frond 6-12 inches long, excessively and finely branched; the 
stem and branches compressed, the ultimate divisions perfectly 
flat and membranaceous. All the branches, through their whole 
length, and through all the divisions, are bordered with distichous 
very slender setaceo-subulate ramuli about a line in length, and 
tapering to an acute point. Frond internally composed, as in B. 
asparagoides, of large polygonal cellules, which are visible through 
the smaller ones which form its surface. No trace of midrib or 
central opacity. Keramidia ovate, immersed in the sinus of the 
marginal ciliae, equally convex on either surface of the frond, 
opening by a pore directed to the axil of the ramulus, and con¬ 
taining a tuft of pear-shaped seeds. These keramidia, or cap¬ 
sules, are usually solitary on each branchlet, and generally but 
shortly removed from the apex; but occasionally a branch is 
found with two, one above the other.—This beautiful plant, 
which, as Agardh well remarks, bears so striking a resemblance 
to the European B. asparagoides, that, except by the fruit, it 
might be difficult to distinguish them, has also many points in 
common with Calocladia pulchra, Grev., and I am disposed to 
concur with Mr. J. Agardh in uniting Calocladia to Bonnemai- 
sonia. So great is the resemblance between Cal. pulchra and 
B. elegans, that, had I not before me an authentic specimen of 
Cal. pulchra communicated by Dr. Greville, and numerous other 
specimens of that plant found by Dr. Joseph Hooker at Kergue¬ 
len’s Land, I should perhaps have fallen into the error of consi¬ 
dering these two species identical. B. elegans is, however, a 
much more delicately and finely branched plant. Its substance 
is far more tender, the cilise that border its branches are slenderer, 
and its capsules are removed from the apex of the ramuli. M. 
Montagne informs me that Greville’s Calocladia pulchra belongs 
to the Lamourouxian genus Delisia, and he considers it distinct 
from D. fimbriata, Lam. 
17. Laurencia ? membranacea, Harv.; fronde plana, tenui- 
membranacea (!), lato-lineari, profunde bipinnatifida; pinnis 
pinnulisque alternis patentibus, inferioribus brevibus denti- 
