DR. LINDSAY ON NEW-ZEALAND LICHENS. 553 
Genus XXIX. ARTHONIA. (Plate LXIII.) 
Sp.l. A. EXCEDENS, Nyl. (Fig. 28.) 
On stockyard palings of ** Goai," Martin's bush, Chain-hills ; on bark of trees, East 
Taeri bush, Otago: W. L. L.: associated with Thelotrema lepadinum, and various corti- 
colous Lecideæ. Apothecia resembling the degenerate apothecia of various corticolous 
Lecideæ ; they are raised, subdiscoid, and subspherical, seated on a white circumscribed 
thallus. Spores variable both in form and size; their size ranges from 0009" to *0015" 
long, 0003” to 0006” broad; most usually they are pyriform and straight; sometimes 
they are broadly ellipsoid, occasionally slightly curved ; normally they are polyseptate, 
eight being the commonest, and six the next commonest number of septa; the upper 
loculi always the largest in the pyriform spore, the central one generally in the ellip- 
soid condition; with age the loculi become sometimes submuriform, while in the young 
state they are round, nucleiform, and moniliform ; or, both in the old and young state, 
the protoplasm from which the loculi are formed consists of amorphous matter, gra- 
aulous-oily; mostly colourless, but exceptionally becoming brown with age, a circum- 
stance common to many typically colourless lichen-spores. Thecæ saccate or broadly 
obovate, 8-spored, spores irregularly arranged; not blue with iodine; *0021" to ‘00457 
long, 0012” to -0021" broad. Paraphyses indistinct. Hymenium generally unaffected 
by iodine, but sometimes pale blue or violet. Both spores and thecæ are very dis- 
tinct; and, from their size also, this is a good species in which to study the minute 
anatomy of the apothecia of Arthonia. 
Sp. 2. A. conspicua, Nyl. (Fig. 29.) [Myriangium inconspicuum, Bab. L. N. Z. 
plate cxxviii. B. | 
On trees, East Taeri bush, Otago: W. L.L. In herbarium Kew there is a North-Island 
specimen from Colenso (on a dead leaf of Phormium tenax apparently), pip iniu 
there refers (and in Syn. Lich. 139) to the British A. lurida, Ach. ; in Lich. Nov o-Grana : 
(67), however, he corrects this reference, and separates it as a species. The apothecia are 
somewhat lecidioid, raised and convex, deep brown: only in the young flat condition do 
they resemble those of A. lurida, from which this plant is abundantly distinct. pies 
oblong-ellipsoid, l-septate, constrieted centrally, and having thus a figure-8 dr T 
brown, -001” long, 0005” broad; they have a general resemblance to pp en E 
those of Physcia pulverulenta. Thecæ broadly obovate, as 18 the Mp pria 
Arthonia ; 0028” long, 0013” broad. Regarding the same specimen in her riy "d 
Berkeley notes that it is a smaller species than, and quite distinct from, Myriang 
Duriei, Mont. and Berk., with which, indeed, it has no true affinity. 
Genus XXX. VERRUCARIA. (Plate LXIIL.) 
Sp. 1. V. GLABRATA, Ach. (Fig. 30.) (V. alba, Schrad., Bab. = ER Quarry, 
On the very rugose barks of old trees, Martin's bush, ip ye Otago: W. L. L. 
Greenisland bush; on branches of trees and shrubs, Stoney Hill bush, 
