590 
VII. LICHENES. 
[ Arthonia . 
3. A. astroidea, Ach. Thallus beneath the bark, indicated by a white 
patch outside, more or less determinate. Apothecia appressed, lobed, divided, 
substellate, ashy-grey within; spores ovoid, 3-septate. — N viand. Lich. Scand. 
259. 
Northern Island : Auckland, on bark, Knight. (Cosmopolite.) 
4. A. minutula, Nyland. Thallus indicated by a white spot on the 
back. Apothecia black, slender, flexuose, irregular ; spores ovoid, 1-septate. 
— Nyland. Prodr. Lich. Gall, et Alger. 169. 
Northern Island : on bark, Colenso. (Europe.) 
5. A. lobulata, Kniglit and Mitt, in Linn. Trans, xxiii. 104. t. 12./. 29. 
Thallus ochreous or grey. Apothecia angular, lobed or snbradiate, plane ; 
margin defined by a narrow line, deep brown, almost black ; spores 1-septate, 
oblong, light yellow 7 , 0‘0002 in. broad, 0 0006 long. 
Northern Island: Auckland, on bark, Knight. — Differs from the other New Zealand 
species in the clavate asci, with the spores in parallel lines. 
6. A. indistincta, Knight and Mitt. l.c. 105. t. 12./. 30. Thallus 
grey, thin. Apothecia irregularly elongate-oblong, simple or branched ; 
border ragged, obscure, grey black, convex ; spores 3-septate, oblong, con- 
stricted in the middle, terminal cells much smallest. 
Northern Island : Auckland, Knight , on bark. — Apothecia mere specks, when magni- 
fied the borders seem to fade into the thallus. 
7. A. albida, Knight and Mitt. 1. c. t. 12./. 31. Thallus white or dull 
white ; edges filamentous. Apothecia prominent, smooth, lobed or angular ; 
thallodal border thin, erect, lilac-brown, powdery ; hypothecium pale, with a 
black spot sometimes at the sides ; spores 3-septate, obovate, yellow ; upper 
cell largest. 
Northern Island: Auckland, on bark, Knight . — Resembles A. cinnabarina, but apo- 
thecia smaller. 
8. A. ramulosa, Knight and Mitt. 1. c. t. 12./. 32. Thallus dull white, 
thin, brown. Apothecia superficial, black, dark brown at the base and sides, 
much branched, bordered by a narrow undulating line ; spores 3-septate, ob- 
long or obovate, brown ; upper cell largest, 0 00020 in. broad, 0'00045 in. 
long. 
Northern Island: Auckland, on bark, Knight . — Apothecia more branched and promi- 
nent than in A. astroidea. 
9. A. ampliata, Knight and Mitt. 1. c. 106. t. 12./. 33. Thallus grey, 1 in. 
and more diameter. Apothecia copious, scattered or parallel, roundish or ob- 
long, partly veiled by the ruptured thallus, blackish-brown ; spores brown, 
5-6-septate; upper cell largest, others often longitudinally divided, 0’0005 
in. long, 0’0013 long. 
Northern Island : Auckland, on bark, Knight. 
10. A. nigro-cincta, Knight and Mitt. l.c. t. 12./. 34. Thallus mo- 
derately thick, whitish-brown, with a lilac tinge, edged with dark. Apothe- 
cia thinly scattered, superficial, simple, irregular, roundish, oblong, bent or 
