LICHENS OF NEW SOUTH WALES. 39 
and Г. elatina, Ach., to that new genus. Koerber states that the apothecia of Нета- 
tomina are margined by a compound excipulum—that is, by a proper and by a thalline 
-excipulum. There exists no proper excipulum іп Г. punicea, the hymenium being 
simply imbedded in the thallus. Th. Fries, in ‘Lich. Scand.’ p. 296, makes no refer- 
ence to the existence of a double excipulum in the Hematomma ; his words are, “аро- 
thecia thallode saltem primitus cincta;" and this omission seems to be made advisedly 
on revision of his earlier publication, * Genera Heter. Eur. recognita, p. 67, where the 
excipulum is stated to be double. 
Parmelia speciosa, Wulf. In the New S. Wales specimens the spores are either 1-sep- 
tate or pseudo-polari-bilocular, or pseudo-4-locular. The normal state both in the Euro- 
pean and Australian Lichen is pseudo-polari-bilocular. The 3-septate spores, occasion- 
ally met with, are resolved into l-septate by the action of glycerine, showing that there 
exists only one true septum. 
Arthonia nympheoides (sp. n.). In connexion with the remarks above on the para- 
physes of the Pertusarie, І would draw attention to Dr. J. Müller's statement in the 
‘Flora’ (April 11, 1879), that paraphyses are always present in the Arthonie, “at valde 
tenellæ clathratim pauciramoss." This, however, requires qualification. Hitherto the 
absence of paraphyses is the main character on which the genus is based. In a few 
species where the thalamium is said to be grumose or homogeneo-grumose, there exists 
no trace of stratification, the structure being devoid of filaments, as in 4. nymphaoides of 
the present paper; or the strictly cellular structure may be so crowded together and con- 
densed that it becomes rude and columnar, as in 4. globuloseformis, Hepp, A. lurida, 
Ach. A. Kempelhuberi, Mass., &c. Again, in other cases distinct filaments are 
found, more or less clathriramose, and the texture more open, as in 4. gregaria, Ach., 
A. Swatziana, Ach., A. Oleandri, «с. 
Parmelia spherospora (sp. n.). Тһе black, coarse, adpressed, radiating hairs around 
the base of the apothecia are in striking contrast with the light-coloured thalline border. 
І cannot call to mind any similar appendage ornamenting the apothecia of any other 
Lichen. 
I make no remarks at present on the geographical relations of the Lichens of New 5. 
Wales. One observes Ше absence of Bacidie, and that the prevailing genera are depart- 
ures from the New Zealand type. 
1. VERRUCARIA ZOsTRA, sp. n. (Tab. УП. fig. 9.) Thallus albo-cinerascens v. cinereus 
tenuis continuus indeterminatus. Apothecia parva e zonula lata complanata nuda 
atrofusca cincta, perithecio dimidiatim carbonizato conoideo-prominulo, hymenio 
hyalino, paraphysibus floccoso-grumosis у. perraro passim parcis inordinatis. Sporee 
5-septatee hyaline oblonge v. oblongo-fusiformes, long. "028, crass. "008 mm. Ad 
cortices arborum *. 
+ Quum de excipulo et hymenio «с. loquimur, de eis aguntur qualia in lamina tenuissima apothecii secti con- 
spiciuntur. 
e 2 
