81 PLANTS FROM NEW CALEDONIA. 
confertæ, ca. 0*5 mm. lat. vel minores, hemisphericæ, apice truncato, primo 
albide velato dein pallide carneo (CaCl + roseo-tincto), apothecium unum 
vulgo continentæ ; sporæ solitariæ, ellipsoideæ, intus laeves, ca. 135-150 p 
long., 30-45 y lat. 
Corticola. Mont Arago, July. In damp forest, 1000 ft. 1466. With- 
out locality. 1467. 
Differs from P. velata Nyl. and from subsp. subvelata Nyl. in the negative 
reaction of the thallus with CaCl alone, in the absence of soredia, and in the 
smaller spores. 
PERTUSARIA PYCNOTHELIA Nyl. Syn. Lich. Nov. Caled. 31, 1868. On 
bark of Mxotheca. Baie Ouémo, Nouméa. 
P. LEIOPLACA Schaer. Lich. Helv. Spicil. 66, 1823. On bark of Ficus. 
Baie Ouémo, Nouméa. Cosmopolitan. 
Var. ocrospora Nyl. Lich. Seand. 182,1861. On bark of Exotheca. Baie 
Ouémo, Nouméa. Cosmopolitan, 
The specimen shows a wrinkled areolate thallus, tinged greenish-yellow in 
places. The verruc are large and congregate. Spores measur 65-75 u x 
30-35 p. 
P. CITRINA, A. L. Sm., sp. nov. ` 
Thallus citrino-sulphureus, tenuis, minute areolatus vel purpuraceus, 
plerumque dense sorediatus (K —, CaCl+ aurantiacus), soralia ca. 0'5 mm. 
lat.; verruce fertiles confertæ vel sparse, hemisphericæ, vulgo minute, 
'5—7 mm. lat., sed usque ad 1:5 mm. lat. CaCl+roseo-aurantiace. Apothecia 
solitaria vel plura : asci cylindracei ; spore octonæ, ellipsoideæ, intus leves, 
ea. 65 u long., 28 y lat. 
Ad saxa ferrugineo-arenosa. Mont Montravel, Nouméa. 
Near to P. sulphurea, but persistently brighter in colour and differing in 
the form and colour of the apothecia, the discs of which in P. sulphurea take 
à violet colour with potash. The reactions of the thallus are also different, 
LECANORACEAS, 
LECANORA SUBFUSCA var. CHLORONA Ach. Syn. Lich. 158, 1814. On bark 
of Acacia. Baie Ouémo, Nouméa. Cosmopolitan. 
L. Lurescens, (DC.) Nyl. Lich. Jap. 110, 1890. Baie Ouémo, Nouméa. 
Two specimens on Ficus bark ; one on Acacia bark; one on Æxotheca bark. 
Oceania (Labuan), Japan, Europe. 
L. GALACTINA subsp. DISPERSA Nyl. ex Cromb. in Grevillea, xviii, 68, 1890. 
On rocks. Mont Montravel, Nouméa. Cosmopolitan. 
L. PARELLA Ach. Lich. Univ. 370, 1810. On bark of Ærotheca. Baie 
Ouémo, Nouméa. Cosmopolitan. 
