DR. LINDSAY ON NEW-ZEALAND LICHENS. 549 
characters of those of L. disciformis :—In old and subdegenerate apothecia, broadly ellip- 
soid, 1-septate or bilocular, the loculi in the young state being nucleiform and sub- 
spherical ; constricted (or not) opposite the septum (where it exists); frequently, especially 
in the old state, figure-8-shaped ; various shades of olive when young, dark brown with 
age, 0006” to 00075” long, :00045" broad. Hymenium very dark blue; apothecia 
subangulous, somewhat resembling those of the genus Melanospora, with an irregular 
margin and outline. "Thallus white. 
Corticolous forms of L. disciformis do not yet appear to have been found in New 
Zealand; the saxicolous forms are not only rare, but by systematists would probably be 
referred to some of the allied species, particularly L. myriocarpa. In New South Wales, 
on the other hand, I found corticolous forms abundant, e. g. on the old palings of the 
Zoological Gardens, Botany Bay, near Sydney. It does not, however, appear to me 
distinguishable properly from L. myriocarpa. Spores (fig. 17) oblong or oblong-ellipsoid, 
l-septate, constricted or not; septum sometimes not median, and upper division of 
spore broader and shorter than lower (soleæform, as in Abrothallus Smithii, L. myriocarpa, 
and the saxicolous Otago form of L. disciformis), brown, "00045" long, 00025" broad. 
Thecæ 8-spored, :0015" long, “0006” broad. Paraphyses indistinet, tips obscured by 
blackish-brown granular colouring-matter. Hymenium beautiful blue. 
Sp. 11. L. myrrocarpa, DC. (Figs. 18, 19.) [Nyl. L. N. Z. 257.] 
a. Corticolous. On twigs of shrubs, East Taeri bush. i 
b. Saxicolous. On porphyritie basalt, Forbury Head; on basaltie boulders, top of 
Kaikorai Hill (associated with Parmelia conspersa, &e.); on mica-slate, Glen Martin, 
Chain-hills, Otago: W. L. L. The plant has a general resemblance to many associated 
Saxicolous Lecideæ, such as L. parasema and L. contigua, but its spores at once separate 
it from the simple and colourless-spored group of the Lecidec. 
Spores Bibl Acc: she BRENT or not, sometimes figure-8-shaped, 
sometimes soleæform, brown, ‘00083 to 00045” long, 00015” to 0003" broad; variable 
in Size and form ; in young state even simple and subspherical, with one central ai 
or two nuclei, instead of distinct loculi. Thecæ 8-spored, narrow Or broad, according 
as the spores are arranged in one or two rows, 0012" long, 00045” broad. ae 
Subdiscrete, tips granular, brown.  Hypothecium brown. Hymenium beaut u 
With iodine, sometimes obscured by dark brown granular colouring-matter. een 
— In specimens in herbarium Kew (“on oaks near Yarmouth, 1805; and on T tpe 
at Halewith, 1805” [Borrer, apparently]) the spores (fig. 19) are brown, i-Sepune, 
"0005" long, 0002" broad. 
Sp. 12. L, STELLULATA, Tayl. (Fig. 20.) 
_ On basalt, south peak of Saddle-hill, Otago: W. L. 
“ose of L, myriocarpa, from which I fail to distingui 
IM Spores oblong-ellipsoid, 1-septate, brown, :0008" long, 
Sspored, 0012" long, *0006" broad. 
L. Thecæ and spores essentially 
sh this species by any good cha- 
0002" broad. Thecæ 
VOL. xxy. 
