542 DR. LINDSAY ON NEW-ZEALAND LICHENS. 
deep red, and generally flat; margin always black, raised, deeply and irregularly notched 
or crenulate, sometimes subinvolute on and obscuring the disk. Thecæ polysporous, 
The plant appears referable to Lecanora pruinosa, Sm. E. Bot. 2244; which, again, may 
be referred to L. cervina, Pers. 
Genus XXIV. UrceoLArıa. (Plate LXII.) 
Sp. 1. U. senvPOsA, Ach. (Fig. 30.) 
On the ground in a steep gully descending to the sea, Green-island Bluff, Otago: 
W. L. L. Thallus more verrucose, and apothecia more urceolate and hidden than is 
usual in British specimens, which, however, are otherwise the same; margin thick and 
involute on the disk. Spores oval, irregular in outline from bulging of the envelope or 
epispore opposite the muriform loculi; dark brown or olive, according to age, :0009" 
long, “00045” broad. Thecæ and paraphyses indistinct. Hymenium not blue with 
iodine. The thallus contains abundant crystals of oxalate of lime, amorphous or in 
octahedra about ‘0006” to *0009" across. 
Sp. 2. U. srrcrica, Krb. (Fig. 31.) [Nyl. L. N. Z. 252.] 
On tertiary grits and conglomerates, base of Saddle-hill, Otago: W. L. L.: associated 
with Parmelia Mougeottii. Resembles in colour of thallus and the appearance of the 
suburceolate apothecia, some forms of Lecanora cinerea. Spores broadly oval, regular 
in outline, brown or olive and muriform as in U. scruposa, 0009" long, "0006" broad. 
Thecæ 8-spored, long, ribbon-shaped, not affected by iodine. Spores arranged ina single 
series. 
Genus XXV. Purrusaria. (Plate LXIII.) 
Sp. 1. P. communis, DC. (Fig. 1.) 
= On living trees, East Taeri bush; on bark of dead trees, Saddle-hill bush; on stock- 
yard palings of “ Goai," Martin's bush, Chain-hills, Otago: W. L. L.: partly in fruit, 
partly variolarioid and sterile. "Thallus smoother and more of a pale yellow colour than 
in British specimens, which otherwise the Otago plant resembles. Apothecial verruc® 
large, and subdiscrete or solitary. 
Spores oblong-ellipsoid, simple; endospore colourless or pale yellow ; broadly margined, 
0060” to -0090” long, “0024” to 0030” broad. Endospore transversely and much 
plicate, the wavy plications forming a serrate outline, and so close and fine that, viewed 
in certain lights, they appear like a series of minute reticulations entirely covering the 
endospore, and in some cases also the epispore; the outline of the epispore is alway® 
regular and entire, however, while that of the endospore is serrate or finely frilled. 
Nylander apparently regards the ** endosporio plicatulo” as a basis for a specific form 
or variety ; but, though far from common, I have met with transverse plication also 10 
the common British plant. Longitudinal plications are not uncommon in all the Per 
tusariæ, British and foreign, both, apparently, of epi- and endospore, though they 87e 
generally confined to the latter; but usually there are few (two or three only) Long 
"mt 
