108 
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Poyzonieae, being included in the tribe Polysiphoniese. A new 
tribe, Amansieae, is made to receive the Rhodomelese, having a 
flattened frond and biseriate tetraspores. The tribe Dasyeae is now 
confined to Heterosiphonia and Dasya. Yanvoorstia and Claudese 
are removed from Sarcomenieae, and placed under a new tribe, 
Anomalophyellse. 
The Chondriopsideae are now divided into nine sections, and 
three new species are added, viz., Ch. subopposita, from California, 
Ch. succulenta (= Ch. sedifolia , Harv., as regards the New 
Holland specimens only), and Ch. arborescens from the same 
country. The first is intermediate in character between Ch. 
secundata and Ch. capensis , the second is distinguished from 
Ch. sedifolia by its gelatinous consistence, it being readily 
destroyed by fresh water. The third, before the fruit was known, 
had been confused with Ch. Rarveyana, to which it is allied, on 
the one hand, but to Ch. striolata and Ch. fusifolia on the other ; 
the colour is blackish. Ch. crassicaulis, Harv., has been removed 
from the genus, being more nearly related to Chrysymenia. Three 
other species are regarded as only doubtful, belonging to the 
ChondriopsideEe, viz., Ch. cartilaginea, J. Ag., Ch. nidifica, Harv., 
and Rhodomela crassicaulis , Harv. 
A new genus, Cyclospora, is created for a curious species, which 
in habit resembles Merrifieldia ramentacea, or a narrow form of 
Grateloupia filicina, but which under the microscope reminds one 
of Caloglossa, the numerous tripartite tetraspores extending in a 
nearly regular series from the apparent central rib to the margin. 
It has been received from Florida. In the synopsis of the tribes 
we find a new genus (?) Cladurus, mentioned under the Chondriop- 
sideas, but it does not appear in the text. 
In the subsequent pages a new species of Pollexfenia, P. nana, 
from New Holland, is described. It differs from P. pedicellata, 
chiefly in its small size, and would seem to be a variety rather than 
a well-marked species, according to the author’s description. Two 
new species of Amansia, A. Hawkeri , from Australia, and A. 
Robinsoni, from Norfolk Island, are described. The former is 
intermediate in form between A. glomerata and A. multifida, but 
more robust than either, the midrib being thickened below, and 
the principal branches becoming twisted and fasciculately branched. 
The second species is a small one, about two inches long, with 
linear, serrate, pinnate ramuli and ramelli. To the genus 
Polyphacum a new species from Australia, having entire scarcely 
twisted branches, is added. It is intermediate between P. Smithies 
and P. proliferum.. To the genus Placophora, a doubtful species, 
P. cucullata is added. It is found parasitical on Areschougia 
ligulata. With this genus the present number is concluded. 
Three plates, illustrative of the structure of some of the new genera, 
are given, and one can only regret that it was not found possible to 
give in addition representations of the form and natural size of the 
plants of the newly -described species. Few, if any others living, 
