102 KNIGHT AND MITTEN ON NEW ZEALAND LICHENS. 
O. prominula, K. & M. Thallus white, uneven or minutely warty, moderately thick, its 
substance containing extensive patches of green round gonidia ; apothecia superficial, 
crowded, subparallel or disposed in all directions, straight or sometimes curved, closed ; 
spores elliptical or oblong, 7-septate, measuring from 0*00015 to 0-0008 of an inch. 
Hab. On trees, Auckland. 
This species resembles O. varia ; but the crust is more even and whiter, and the apothecia 
for the most part entirely closed by the more prominent border of the perithecium. 
Pl. XI. fig. 19. a. section of thallus and apothecia ; b. theca ; c. spores. 
Graphis, Ach. 
G. confinis, K. & M. Thallus cream-coloured or grey ; apothecia immersed, elongate, 
wavy, sometimes branched or forked, the ends acute, closed by the inflexed perithecial 
margin ; perithecium entire below, or dimidiate ; spores 6-8-septate, intermediate 
spaces transversely oval, measuring from 0*00034 to 00011 of an inch. 
Hab. On the bark of trees, Auckland. 
The paler thallus and narrower and thicker border of the perithecium easily distinguish 
this from the Graphis scripta, Ach., with which it most nearly agrees in the form of its 
spores, but from which it differs in the generally entire perithecium (which is also closed 
above), and, as it would appear, in the smaller size of the entire plant. 
Pl. XI. fig. 20. «. section of the thallus and apothecia; b. theca containing spores. 
Fissurina, Fee. 
F . rxsmiosA, K. & M. Thallus thick, uneven, warty, dull green, brownish when dry ; 
apothecia crowded, simple or branched, deeply immersed in the thallodal warts, closed, 
their lips slightly paler ; spores in a single series, oval or obovate, yellow, before ma- 
turity with a broad hyaline margin, measuring from 000035 to 0*0007 of an inch. 
Hab. On the bark of trees, Auckland. 
1 ii the dried state the thallus is of a dull brownish colour, and it appears to be surrounded 
by a narrow black border. The apothecia, which are quite undistinguishable from the 
thallus by the naked eye, appear, when magnified, to be but fissures ; in the more per- 
fectly developed ones there is seen to be a slightly paler margin, sunk below the surface of 
the thallus, representing the lips of the lirella ; a transverse section shows no trace of a 
perithecium, beyond a dark spot in the interior of the substance of the margin of the 
fissure. The thalamium is opaline, the epithecium brown. 
Pl. XII. fig. 21. a. section of thallus and apothecium; b. thecae ; c. spores. 
F. INQUINATA, K. & M. Thallus cartilaginous, polished, ashy-grey or brown, uneven ; 
apothecia deeply immersed, elongate, wandering, variously branched and wavy, narrow, 
almost covered by the darkened border of the thallus ; spores oblong or obovate, yel- 
low, 3-4-septate, with a narrow hyaline margin, measuring from 000040 to 0*00084 
of an inch. 
Pl. XII. fig. 22. a. section of thallus and anothecium: A. theo* • *. snnrp 
