NEW LICHENS. 165. 
centre, with short linear terminal laciniæ. Inferior sur- 
face smooth, inflated and pierced with minute holes, which 
distinguish it from its congeners. 
11. P. cristifera, Tayl.; thallo orbiculari, albido, elevato- 
rugoso, glabro, lobis rotundatis, depressis, integerrimis, 
subtus margine nudo, glabro, castaneo, medio nigro- 
punctato atque fixuris atris devincto ; gemmis margina- 
libus, confertis, pulveraceis, concoloribus; apotheciis 
sparsis, concavis, disco pallide castaneo, margine incurvo, 
demum pulverulento. 
Han. Calcutta; Wallich. Mauritius; Dr. Wright. Brazil; 
Gardner. Demerara; Mr. Parker, Hook. herb.—Thallus 
6-8 inches wide, cream-coloured, unaltered by moisture; 
the margins of the lobes at the central parts with conspi- 
cuous elevated crestS of powdery buds. It is allied to 
P. perlata, Ach.; but the clusters of buds are more 
minute; and the inferior surface is destitute of black 
tricæ. 
12. P. cylindophora, Tayl.; thallo orbiculari, fusco-castaneo, - 
stellato, rugoso, lobis sinuato-pinnatifidis, subimbricatis, - 
laciniis convexis, crenatis, margine subtus pallentibus, : 
tenuissime villosis ; gemmis concoloribus, spindle cames 2 
albidis, : | 
E Has. Madras; Dr. Wight, Hook. herb, —Neat! four 
aoe UN diameters dusky brow int oliva, sa what gt ; 
marginal rather concave. ‘Bade often ie or more clus- - 
tered together; the margins of the laciniæ and tops of the : 
buds whitish. The cylindrical buds. readily distinguish 
Pa AM from. P. Y opu is which it resembles | 
