242 Transactions.— Botany. 
I have not seen Lundell’s description of his plant, which appears to be 
very rare in England. But, in the ** Midland Naturalist,” vol, iv., 1881, 
I find C. cyclicum figured by Mr. A. W. Wills, without description. Assum- 
ing, as is most probable, that this figure is accurate, the English plant 
differs from ours in having a deep narrow constriction, so that the seg- 
ments approximate quite closely and indeed touch each other. In the 
New Zealand variety the wide shallow constriction is quite conspicuous, 
and the segments diverge from each other at once. 
C. botrytis, Bory. (R. XVI.) 
In my former paper I expressed doubts as to this species; but many 
specimens have since come under my observation and there is no doubt 
"that the plant occurs here plentifully. It is common near Christchurch 
and in the Cust Valley. 
C. tetraophthalmum, Kiitzing. (R. XVII, XXXIII.) 
Var. a, the large form. 
I have no specimens from Caines which I can with certainty refer 
to this plant, but several occur in gatherings from Hawke’s Bay. I see no 
difference between it and the English plant. 
Var. 8, the small form. 
Fig. 8. 
The frond is small, more orbicular than in var. a, the segments being 
broader than long and the pearly granules are much smaller, indeed incon- 
spicuous. I should not have considered the two as the same species, were 
it not that in one of Mr. Joshua’s English gatherings I find a plant 
(apparently identical with this) which is labelled ** Cos. tetraophthalmum, 
small form, zygospores, not botrytis, fide Nordstedt.” In that gathering are 
some specimens in conjugation, and I have been fortunate enough to find 
one here also in the same condition, as shown in my figure. I may observe 
that Ralfs, in his description of the large form, says,—‘ the sporangia are 
large and their spines finally branched; ” but in his pl. xxxiii. he figures 
the spines as subulate. Those of my English specimens are also subulate, 
but ptenenie in both instances the zygospores are not mature. 
Length in front view, 44 u; breadth, 40 »; diameter of zygospore, in- 
cluding spines, 65 y. 
Rare: from Lyttelton. 
C. undulatum, Corda, var. B, var. nov. (?) 
Fig. 9 
The distinctive charaeter of this plant is its small size, the length being 
only 88 u, the breadth about the same. In Ralfs? plate xv. two sizes 
are shown, but both are larger than our plant, and the measurement given 
in the same work is, length zły of an inch, or about 68 y. 
