Kuient.— Further Contributions to Lichen Flora of N.Z. 321 
mally globose ; ostiole brown, depressed, at first closed, then open; nucleus 
brown; paraphyses filiform. Spores 8, colourless, boat-shaped, murali- 
divided; length 09 ad. ‘15 mm., breadth -025 ad. -04 mm., epispore thick. 
On bark of trees. 
Syn. Thelenella Wellingtonii, Stirton (‘ Jour. Linn. Soe.,” Vol. XIV., p. 
473.) | 
Fig. 14, Section of apothecium (too dark, nucleus diaphonores, but becoming light brown 
14, a and b, Ascus and spores magnified 300 diameters. 
Chiodecton ( Platygrapha) inconspicua, Knight and Mitten. 
Thallus crustaceus cinereo-violaceus verruceformis, verrucis dilute con- 
coloribus. Apothecia minuta normaliter globosa, in verrucis thallinis 
rotundatis v. flexuoso-elongatis supra planiusculis immersa—(passim con- 
fluentia)—plura in quavis verruca unumquidque atro-fusco toro oriens, 
disco rotundo v. oblongo v. attenuato-oblongo nigro. Sporae oblongo- 
fusiformes curvatulae 3-septatae incolores, longit. 05 mm., crassit. (004 mm. 
Ad cortices arborum. 
Syn. Chiodecton conchyliatum, Stirton, C. moniliatum, Stirt., et C. 
sinuosum, Stirt. 
Thallus crustaceous, ashy-violet, verrucoid; verrucae lighter colour. 
Apothecia minute, normally globose, immersed in roundish or flexuose 
elongated thalline verrucae—(here and there confluent)—several in each 
verruca, each arising from a blackish-brown torus, disc black, round or 
oblong or tapering. Spores oblongo-fusiform somewhat curved, 3-septate, 
colourless, length 05 mm., breadth 004 mm. 
On bark of trees. 
The genera Platygrapha and Chiodecton are very closely allied. The 
apothecia arise from a brown torus, and are surrounded by a spurious 
thallodal margin, which, in Chiodecton, assumes a verrucoid appearance 
from the confluence of a number of apothecia. 
Fig. 15. (1), Section of apothecium magnified 14 diameters. 
15. (1) a, Spore no 
Opegrapha saxicola, Ach. - 
Thallus obliteratus. Apothecia atra lirellaeformia saepe flexuosa rarius 
rotundo-difformia, epithecio pliciformi v. rimiformi, marginibus parallelis v. 
Ql 
