DR. LINDSAY ON NEW-ZEALAND LICHENS. 517 
are abundant, black and punctiform; but their external character is that of those of 
P. conspersa rather than that of P. caperata. (Linds. Spermog. 233, plate xii. figs, 
39, 40.) 
Sp. 8. P. MOUGEOTTII, Scheer. 
1. On tertiary grits and conglomerates, base of Saddle-hill, in fruit; on mica-slate, 
Glen Martin, Chain-hills, Otago: W. L. L.: a common saxicolous lichen in the Greenis- 
land district, but less common than P. conspersa. Apothecia sometimes black or deep 
ehestnut-brown ; convex and lecanorine or subbiatorine, differing considerably from 
those usual in P. conspersa. "Thallus much more minutely divided than in P. conspersa, 
lacini: narrower and darker, and the whole plant much smaller. But in regard to all 
essential characters the plants are the same; the hymenium, thecæ, paraphyses, and 
spores are exactly as in P. conspersa; and therefore I am led to regard Mougeottü as 
merely a small form of conspersa. Some Otago specimens, labelled Mougeottü by Ny- 
lander, in my herbarium, have the apothecia, as well as laciniæ, of conspersa. 
Sp.9. P. saxaTILIS, Ach. [Linds. Spermog. 226.] 
1. Common on various trappean rocks and boulders, mostly basaltie, about the For- 
bury, Dunedin; Signal-hill, North-east Valley, Dunedin; on the “ Big Rock," Saddle- 
hill; on tale slate, Otokia Bluff; on slaty traps and trap conglomerates, Ferry-bluff, 
Clutha Ferry (in fruit). The plant seems as variable as in Britain, but is much less 
common. It is generally sterile, sometimes ochraceous, or exhibiting in whole or in part 
various shades of red. Some forms are what would be in Scotland named var. ompha- 
lodes, Fr. (e. g. on the Forbury cliffs); while others, with very small, narrow, blackish 
lacinize, approach, or are, the European alpine var. panniformis, Scher. (e.g. Ferry- 
bluff, lower Clutha). 
2. In my herbarium, suite of specimens from Hermite Island, Cape Horn Dr. 
Hooker, Antarct. Exped.: all sterile. Exhibit, passing into each other, the conditions 
own in Europe as omphalodes, panniformis leucochroa (Wallr.), and di 
(Schær.), Of these, none appear to me to deserve separate place or name, n perhaps, 
onphalodes, whose bronze-colour is a somewhat constant character. - 
— Submitted to ammoniacal maceration, Otago specimens yielded a rich chocolate-brown 
Colour, instead of the fine red it sometimes furnishes in northern countries *. i — 
ls sometimes the site of the parasitic Abrothallus ozysporus, Tul., in CR. 
Smithii, Tul., or other parasitic lichens, as well as Dothidea homostegia, Ny s i 
Pigottii, Berk. & Broome, or other parasitic fungi which infest its thallus in , 
may be found also to occur thereon in New Zealand. 
Sp. 10. Pp. OLIVACEA, Ach. [Linds. Spermog. od Martin, Chain-hills 
l. On basaltie rocks or boulders, Saddle-hill; on Rie E (Bab. L. N. Z.). 
Otago: Wy, L.L. Hitherto apparently found only in the No 
Ex 4 » pä dos. Journ. July 1855, p. 19. 
* “Experiments on the Dyeing-properties of Lichens,” Edinb. New Philos 
* Obs, Otago Lich. & Fungi, p. 410, plate xxix. fig. 6. “> 
VoL. xxv, : 
