226 PLANTS COLLECTED IN OTAGO, NEW ZEALAND. 
of Germany, p. 134, unites the genera Phyliactidium and Coleochete 
assall’s description of his specimens of Coleochete, that he must have 
confounded this Alga and some of the Coleochete of Brebisson together. 
The two genera are most distinct, and I believe that Phyllactidium 
must be separated from Coleochete, which is allied to Bulbochete, and 
formed into a family by itself, characterized by the simplicity and uni- 
formity of the cells, and the very peculiar fructification. 
I have compared the specimens from Manchester with authentic spe- 
cimens of Phyllactidium and Bulbochete from Germany, which are in 
the British Museum collections. The Manchester specimens are larger 
and better developed, but not otherwise different. 
Phyllactidium is known from the discoidal form of Bulbochete by 
the frond being membranaceous, and of equal thickness in all its parts, 
and the cells similar on both sides of the surface. In Bulbochete, on 
the contrary, the upper surface of the frond is covered with trumpet- 
shaped tubes, emitting a long seta, which are more abundant near the 
centre of the frond, the frond much thickened by them, and the fructi- 
fication, which is well described by M. Brebisson (Ann. Sc. Nat. sér. 3; 
t. Journ. i. 29. t. 2), is very different, as I have proved by a micro- 
scopic examination of the fructification of the two genera. 
The fronds of Phyllactidium ave regularly circular, and composed of 
very regularly-dispersed, forked, radiating lines of cells, until they arrive 
` at a determinate size; then some of the cells on the margin diverge, 
and seem to form a centre for themselves, and the edge becomes proli- 
ferous ; but this is a fact that does not seem to have been observed by 
- the German algologist; and as the manner in which the cells develope 
is very various and peculiar, I must leave this part of the subject to 
another paper devoted to that object, which will be illustrated with 
figures, which Miss Staveley has most kindly prepared for me. 
PHJENOGAMS AND FERNS COLLECTED IN OTAGO, 
NEW ZEALAND. : 
By W. Lauper Lixpsav, M.D., F.K.S. Epry., F.L.S. 
The following is a systematic enumeration of the Flowering-plants 
