442 ALG& OF TASMANIA. 
ward resemblance to P. byssoides, but is of a totally different 
structure: and it also something resembles Acanthophora 
Delilii, whence the specific name. 
Tribe 2. CHONDRIES, J. Ag. 
16. Bonnemaisonia elegans, Ag.; fronde compressa, mem- 
branaceá, anguste lineari, decomposito-ramosissima ; ramis 
alternis, flabellatis, ramulis setaceo-subulatis distichis 
alternis utrinque pectinatis; keramidiis solitariis ovatis in 
jugamento immersis, poro ad axillam directo. Ag. Sp. 
Alg. vol. i. p. 198. 
George Town, V. D. Land, R. Gunn, Esg., 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 bor- 
dered 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 ORBE 
which form its surface. No trace of midrib or central opacity. 
Keramidia ovate, immersed in the sinus of the marginal 
cilie, equally convex on either surface of the frond, opening 
by a pore directed to the axil of the ramulus, and containing 
a tuft of pearshaped seeds. These keramidia or capsules 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 i : 
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 dis" 
posed to concur with Mr. J. Agardh in uniting Calocladia to 
Bonnemaisonia. So great is the resemblance between ©@ 
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. 
