216 DR LAUDER LINDSAY ON THE SPERMOGONES AND PYCNIDES 
colour, and its surface is generally more or less reticulate or fissured. Hence 
this var. passes into, and is closely associated with, var. reticulata. 
3. Var. reticulata is pro parte P. reticulata, Tayl., which also belongs partly 
to P. perlata. It is chiefly a New Zealand species. 
4. Var. rugosa, the P. rugosa, Tayl., “ Fl. Hib.,” 145, which may sometimes 
also belong, pio parte, to P. saxatilis. 
5. Var. levigata, Ach. The P. levigaia, Tayl., ‘“‘ Fl. Hib.,” 148, Eng. Bot., 
1852 ; chiefly an Irish species, but which occurs also in America. 
6. Var. erratica mihi, a curious erratic form, so far as ] am aware as yet 
peculiar to Melbury Hill, near Shaftesbury. Dorsetshire, 
Specimen 1.—On Dunkerron, Ireland ; coll. Taytor; in Herb. Mackay; with 
apothecia. The thallus is thick and coriaceous; the ends of the lacinice frequently 
bear large soredia, as is commonly the case in foreign specimens; and the colour 
of the thallus is that of P. conspersa. Its colour would refer it to NYLANDER’s 
var. relicina (Parmelia relicina, Fr.) Intermixed with the spermogones occur — 
Pycnides, having all the outward aspect, as well as the site, of the spermogones. 
It admits of a doubt whether these bodies really belong to P. sinuosa, as | have 
not found them in other specimens. But, on the contrary, there are no grounds 
for supposing that, while the spermogones of P. sinuosa really belong to that 
species, the pycnides which occur in this individual specimen do not! The 
pycnides are minute, black, punctiform bodies, wholly immersed, and scattered 
near the margins of the lobes, on their flat surface. Their envelope is brown. 
Their stylospores vary much as to size and form; they are mostly spherical or 
oval, about =;th in diameter, on very short, simple, linear sterigmata. The sper- 
mogones, with which these pycnides are associated, are frequently largish, brown, 
round bodies, seated on warts of the thallus. 
Specimen 2.—Apparently also from Ireland; coll. Miss Hurcuins, 1810; in 
Herb. Hooker, Kew; said to be “common on rocks.” The spermogones are 
chiefly old, and sometimes occur as largish, round, flat maculee. 
Specimen 3.— Ballachulish, Argyllshire, 1807; in Herb. Hooker, Kew. The 
thallus has the greenish-yellow colour of P. conspersa, and is therefore referrible — 
to Frirs’ P. relicina. The spermogones are few and scattered, and resemble out- 
wardly those of P. conspersa. Glen Nevis; coll. Borrer, 1810; also in Herb. 
Hooker; a few young spermogones, containing no free spermatia. 
Specimen 4.—Jamaica, Dr Wricnt. The spermogones are very abundant, 
dotting over the entire convex surface of the lacinie, but grouped especially about 
their extremities. They are generally brown, punctiform, wholly immersed, 
sometimes with a depressed ostiole, at other times seated on small, ill-marked | 
thalline papille, frequently irregular as to form. Mauritius, Boyer; Casapi, 
Peru, Martuews ; Columbia, Jameson ; Quito; old spermogones become large, , 
round, black depressions on the surface of the thallus; Chinar, Kumaon, Hima- 

