106 KNIGHT AND MITTEN ON NEW ZEALAND LICHENS. 
A. ampliata, K. & M. Thallus grey, apothecia scattered or arranged in a somewhat 
parallel manner, roundish or oblong, partially veiled by the ruptured thallus, blackish- 
brown ; spores brown, 5-6-septate, the upper cell much the largest, the adjoining and 
sometimes all the other cells divided by a longitudinal septum, measuring from 
0-0005 to 0-0013 of an inch. 
Hub. On bark, Auckland. 
Thallus an inch or more in diameter, thickly covered with the black-looking rather 
large apothecia. Opegrapha atra, y. obscura, Schser. Lich. Helv. No. 517, which has also 
5-6-septate spores, is distinguished by its ochreous thallus and small yellow spores, mea 
t* 
surmg from 0-00025 to 0*00065 of an inch, having their upper cell of the same size as 
the lower. 
Pl. XII. fig. 33. a. section of thallus and apothecium; b. theca; c. spore. 
A. kigro-cincta, K. & M. Thallus moderately thick, light brown or dull white, edged 
by a dark line ; apothecia superficial, simple, irregular, roundish, oblong, bent or 
curved, one end larger, blackish-brown ; spores obovate, 4-septate, light yellow, mea- 
suring from 0-00030 to 0-00084 of an inch. 
flab. On bark, Auckland. 
In a dried state, the thallus is of a whitish-brown colour with a tinge of lilac, the dark 
margin wide and very evident ; it appears to form patches of an inch or more in diameter. 
1 he apothecia are thinly scattered, their internal substance brown ; there is no dark mar- 
ginal line as in most of the allied species. 
Pl. XII. fig. 34. a. section of thallus and apothecium ; b. spores. 
Collema, Ach 
C. OOKTiGimM, K. & M. Thallus obscure green (when dry, black), consisting of tufted 
complicate lobes containing moniliform green filaments ; apothecia small, close 
together, arising just within the margin of the thallus, and projecting beyond it, pale 
brown ; spores ellipsoid, multilocular, measuring from 0-0003 to 0-0008 of an inch. 
Hab. On wood, New Zealand. 
The aspect of this species in the dried state is at first sight very similar to that of 
*•*••• wnplwria, De Cand. ; but on being moistened, it immediately becomes evident 
^ ~°? SmaU ap ° theCia arise fr0m J ust ™ thin «w edge of the erect or ascend- 
Ach I Z v \ '1 C ; m P Ucate thallus - In *». too, it resembles Collema mhrophylUm, 
Ach., but ls dtstmct from that species in its differently lobed thallus. 
t"al 8 ; 8 3 et rf thaUUS ( " atUra !. 8iZe) ; »• P° rti <> n « f «-ll™ WM, apothecium in section ; e. theca and 
pcuciuiiyses: a. snore : p mnm fA^ hl. i. /•____ .* ' 
liform 
