KNIGHT AND MITTEN ON NEW ZEALAND LICHENS. 103 
A browner- coloured species than the last, the thallus less warty, and the apothecia in- 
distinctly marked out to the naked eye by a stained line ; when magnified, there is no- 
thing, beyond the fissure, to be seen of the epithecium ; on making a transverse section, it 
becomes evident that the stained appearance surrounding the fissure is due to the almost 
black traces of the sides of the perithecium imbedded in the thallus, more evident in 
some examples than in others. The thalamium is opaline, considerably dilated below, 
and the epithecium deep brown. This species very closely resembles F. nitkla, Mont., 
and may be a form of that species ; but the spores could not be found in an authentic 
specimen. 
Platygrapha, Nyl. 
P. micrqsticta, K. & M. Thallus dusky grey ; apothecia round or oblong, flexuose, simple 
or branched, broader at one end, ends rounded ; epithecium dark brown ; hypothecimn 
black; spores fastigiate, fusiform, 3-septate, measuring from O00010 to 0*00140 of 
an inch. 
Hab. On bark, Auckland. 
Thallus everywhere covered at equal distances by the apothecia, which to the naked eye 
resemble minute black specks. 
Pl. XII. fig. 23. a. section of thallus and apothecium ; b. theca; c. spores; d. apothecium as seen 
from above. 
P. inconspicua, K. & M. Thallus brown, with a slight lilac tinge when dry ; apothecia 
very minute, roundish or oblong, with one end acuminate, immersed ; hypothecium 
black ; epithecium contracted, blackish-brown ; spores fastigiate, not ? septate, fusi- 
form, measuring from 0-00120 to 0*00175 of an inch. 
Hab. On bark, Auckland. 
This species seems remarkable for a dull lilac-brown colour. The apothecia are quite 
invisible to the naked eye, and when magnified resemble black dots. The spores appear 
to be without any trace of septa. 
Pl. XII. fig. 24. a. section of thallus and apothecia; b. theca; c. spore. 
P. TUMedtjla, K. & M. Thallus dark yellowish-brown, somewhat swollen around the 
elongate curved or short apothecia ; epithecium flat, irregular, bistre, defined by a 
very narrow dark line ; hypothecium brownish-black ; spores fastigiate, fusiform, 
measuring from 0*0001 to 0-0014 of an inch. 
Hab. On bark, Auckland. 
The colour of the thaUus in the dried state resembles that of Lecidea paramenia. The 
apothecia are conspicuous to the naked eye, and are very irregular in their form and size. 
The spores, like those of the preceding species, have no septa. 
Pl. XII. fig. 25. a. section of thallus and apothecium; b. theca; c. spores; d. apothecia as seen from 
above. 
