rate in the young state, appearing as small tubercles, 
DR. LINDSAY ON NEW-ZEALAND LICHENS. 521 
Nephromata into the genera Nephroma and Nephromium appears to me unneces 1! 
founded, as in the parallel secession of Stictine from Stiete, on a sin gle à re - 
minor significance—the form of the gonidia. a 
Genus V. PELTIGERA. (Plate LXI.) 
8p. 1. P. RUFESCENS, Hffm. (Fig.15.) [Linds. Spermog. 174.] 
On trunks of dead trees, East Taeri bush, in fruit. Apothecia and portions of the thallus 
exsio-pruinose. Spores (5) narrowly fusiform, colourless, polyseptate, 0015” long, *0006" 
broad. Thecæ (a) 8-spored, “0036” to 0045” long, ‘00045” broad. Paraphyses discrete. 
Hymenium beautiful blue with iodine; constituents distinct. This is the only species of 
its genus I found in Otago; it occurs in my herbarium only from one locality, and the 
specimens are very poor. So far as my own experience goes, the genus Peltigera is 
apparently as rare in the eastern districts of Otago as Umbilicaria. But Babington 
(L. N. Z.) describes P. polydactyla, Hifm., as “very abundant in New Zealand.” He 
records further the occurrence of P. spuria, DC., in both the northern and southern 
islands ; and it is probable, therefore, that further botanical research may prove the genus 
to be more common throughout New Zealand than it has yet been ascertained to be 
Like Umbilicaria, the genus Peltigera is much more largely represented in the northern 
than in the southern hemisphere, both as regards the number of species and individuals, 
and the degree of their development. More especially do they luxuriate in the forests 
of Europe and North America. Some forms are cosmopolite ; others prefer cold or alpine 
regions. Within the tropics they appear to be rare, though, like Umbilicaria, they are 
in found sometimes in the alpine regions thereof (e. g. the Himalayas and Abyssinian 
ps). 
I am disposed to refer P. rufescens, P. spuria, P. polydactyla, 
species presently so called, to one type, the common P. canina, Hffm. 
as well as certain other 
Genus VI. COLLEMA. 
Sp. 1. C. LEUCOCARPUM, Tayl. 
On trees, East Taeri bush, sterile, associated with Psoroma 
m lidotoides, Nyl.; on trees, Martin’s bush, Chain-hills, apo 
ated with Pannaria gymnocheila, N yl. : both in Otago : W. L. L. Spores fusiform, poly- 
ptate. Thecæ 8-spored, ‘0024 long, 0006” to “00075” broad. Hymenium blue with 
pe Paraphyses scarcely exceeding in length the thecæ ; subdiserete subtubereulated 
tips, obscured by granular pale-brown colouring-matter. Apothecia buff pruinose, 
‘ometimes very prominent on the greenish-black thallus, occasionally abortive and dege- 
which may become confluent, 
ogones. Thallus varying in colour and 
and of a beautiful pure leek- 
of a dark slate- 
sphinctrinum, Mnt., var. 
thecia abundant, asso- 
E somewhat, externally, resemble sperm 
ure, sometimes (especially when sterile) subdiaphanous à 
steen; fructiferous forms are more generally duller or blackish green, OF 
ur, 
b f um Kew, spermogones 
some New-Granada and Tasmani er j 
an specimens in the herbari 
