KNIGHT AND MITTEN ON NEW ZEALAND LICHENS. 105 
plane, margin denned by a narrow line, deep-brown, almost black ; spores 1-septate, 
oblong, light yellow, measuring from 0*0002 to 0*0006 of an inch. 
Hab. On bark, Auckland. 
Pl. XII. fig. 29. a. section of the thallus and apothecium; b. theca; c. apothecia as seen from above. 
This species differs from the following in its clavate thecae. In the other New Zealand 
species they are turbinate or pyriform, and the spores disarranged. In A. I if rid a Ach., the 
spores are one-septate, measuring from 0*00018 to 0*00050 of an inch ; but the apothecium 
roundish and convex above 
A 
indistixcta, K. & M. Thallus grey, thin ; apothecia irregularly elongato-oblong 
simple or branched, margin ragged and obscure ; epithecium greyish-black, convex 
spores 3-septate, oblong, constricted in the middle, terminal cells much the smallest 
light yellow, measuring from 0*0004 to 0*0010 of an inch. 
Hab. On bark, Auckland. 
The apothecia to the naked eye resemble small black specks ; when magnified, thev 
appear at their margins to fade into the thallus. 
Pl. XII. fig. 30. a. section of thallus and apothecium; b. theca; c. spores; d. apothecium as seen from 
above. 
A. albida, K. & M. Thallus white or dull white, smooth ; apothecia prominent, irregu- 
larly lobed or angular, with a thin erect thallodal margin ; epithecium lilac-brown, 
pulverulent; hypothecium pale, but a black spot sometimes present at its sides; 
spores 3-septate, obovate, yellow, upper cell the largest. 
Hab. On smooth bark, Auckland. 
Thallus nearly white, fading away at the margin like the mycelium of a fungus ; apo- 
thecia evenly dispersed over the thallus, of a dull lilac-brown. In general appearance 
this species resembles A. cinnabarina, "Wallr. ; but the apothecia are smaller, and there 
is no trace of the red exudation. A. cinereo-pruinosa, Schaer. (A. biformis), Lich. Helv. 
Exsic. No. 251, has roundish or irregularly oblong, not angular apothecia, and the spores 
reddish-brown, measuring from 0*00020 to 0*00052 of an inch. 
Pl. XII. ng. 31. a. section of the thallus and apothecium ; b. theca ; c. spores j d. outline of the apothecium 
as seen from above. 
A. ramtjlosa, K. & M. Thallus dull white, verv thin; apothecia superficial, black, with 
a dark-brown base and sides, much branched, bordered by a narrow undulating line ; 
spores 3-septate, oblong or obovate, brown, upper cell the largest, measuring from 
0-00020 to 0-0001-5 of an inch. 
Hab. On wood, Auckland. 
Apothecia more branched than those of A. astroidea, Ach., and more prominent. 
p L. XII. fig. 32. a . section of the thallus and apothecium; b. theca; c. outline of the apothecium as seen 
from above. 
VOL. XXIII 
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