POTTIACEAE. 137 
Hemisphere would be from the point of view of its geographical distribution. 
Paris gives New Zealand (I am not sure on what authority), but all the other 
localities, —— over practically all Kurope, and North America from the 
Arctic zone to California, and extending into Asia, are from the Northern 
Hemisphere. Cardot , howeve er, has identified it from Chile, Patagonia, 
solely on the authority of Paris or not I do not know), and any objection 
from the geographical standpoint is therefore overcome. Brown’s specimens 
again drying they twist strongly to the left as usual. This is also the case 
with — labelled ‘“‘ P. Douglasii R. Br., moist ground, Christchurch, 
N.Z., A .- Wright, 1 July, 1894, ex herb. Beckett,’ sent me by 
Rev. °C. a. Binstead. 
It is found in ee ground, almost always near the sea, and is readily 
known by the leaves sharply denticulate or dentate near the apex, acuminate 
with a cuspidate point formed by the excurrent nerve, by the long seta an 
rather large, pachydermatous capsule, the lid of which after uperse remains 
for some time attached to the columella, finally falling off with it 
The spores are large, 25-35 mw, n normally finely punctulate, “but in the 
New Zealand plant occasionally with rather coarse, irregularly scattered 
tuberculate papillae. This I have also found in the Tasmanian plant 
a elow. 
distinctly bordered leav The marginal cells in one or two rews, in 
. Heimii, are occasio. ally slightly differentiated from the inner, but not 
so as to form a conspicuous border. 
P. Heimii is very variable in size, &c., and the synonymy, which I have 
not thought it necessary to give, is a very long one. ve a specimen 
fom Kakanui, Otago (coll. D. Petrie, Sept., 1892, No. 604), Sent me by 
Rev. C. H. Binstead, labelled “‘ Pottia aristata Broth.* n. sp.,” which also, 
I feel certain, is to be referred to P. Heimii. The species may possibly 
- 
t at present is only known 
Sonth Island, I have it, however, also from Tasmania, coll. Weymouth. 
4. _ serrata R. Br. ter., op. eit., vol. 26, p. 291, tab. 32 (1894). 
ecimens survive in Brown’s herbarium, and I have nothing to go 
rincipally (a) the very short seta, “ 
is easly le a though I have a specimen from Scotland with the setae 
all just that length; (6) the apparently free operculum, judging by the 
figure, and the absence of any note by Brown, who describes in P. Douglasii 
* The writing is not clear: it might be “ Beck.” 
