244 DR. LINDSAY ON THE SPERMOGONES AND 
3000 long, and 45:355 broad, simple or articulated, in the former case sometimes branch- 
ing digitately below. 
Specimen 3. Ireland: Taylor in herb. Mackay, sub Zecanora. The apothecia here are 
certainly Lecanorine; and it admits of doubt whether this species should not be trans- 
ferred to the genus Lecanora. It is one of several species, whose apothecia are in some 
cases Lecanorine and in others Lecideine, and that have equal claims, therefore, to rank 
in the genus Zecanora or Lecidea! The spermogones are here plentiful, scattered irre- 
gularly among the apothecia as small brown warts, indistinct under the lens. 
Specimen 4. Pass of Keim-an-Eigh, co. Cork, Carroll, Mar. 1858. What appear to be 
spermogones occur in the position of those of Z. fusco-atra; but no spermatia were 
seen. 
Specimen 5. Var. lyyea, Ach. On argillaceo-schistose rocks of the Pyrenees: Scheer. 
Exs. no. 626, sub Lecidea lygæa. The spermogones here again resemble those of L. fusco- 
atra, being scattered abundantly among the apothecia as small, black, subprominent, 
flattened spots, with a pale thalline border; the body immersed. The spermatia are 
oblong or ellipsoid, about 45555 long; the sterigmata very delicate, simple, and linear, 
13500 — 3399 long, sometimes bifurcating from base, 
Species 6. L. TENEBROSA, Flot. 
Specimen 1. On sandstone, Haughmond Hill, Shropshire: Leight. Exs. no.93. Asso- 
ciated with Z. geographica, var. spherica, Sch. Thallus areolate, the areolæ often con- 
siderably separated from each other, sometimes pulviniform, always greyish or brownish, 
The spermogones sometimes appear as mere perforations of the thallus. Occasionally 
these ostioles are surrounded by a black ring, or they occupy the centre and apex of 
inconspicuous black cones. The spermogones are always more or less immersed, large, 
and distinct. The spermatia are short and suboblong, seated on linear, simple sterig- 
mata, like those of Ramalina. 
Specimen 2. On serpentine (apparently), Caradoc Hill, Shropshire: Leight. Exs. 
no. 129, Associated with L. geographica. The spermogones externally resemble those of 
L. fusco-atra, being scattered over the dull-coloured scales of the thallus. The spermatia 
are minute rods; the sterigmata linear, as in Ramalina. In some spermogones there 
are branching and anastomosing, sterile, hypertrophied filaments, much thicker than the 
fertile ones, as in Ramalina. r 
Specimen 3. On basalt of the stone circles of Abdon Budly, the highest land (1806 ft.) 
in Shropshire: Leight. Exs. no. 188. The thallus is dotted over here and there, as in 
L. contigua, with the perithecia of Verrucaria pygmea, which are apt to be mistaken 
for spermogones. The small, brown, 1-septate sporidia, and the polysporous asci, how- 
ever, at once distinguish the parasite. 
Species 7. L. cazcivora, Ehrh. (Mudd, Brit. Lich. p. 203). 
Specimen 1. On limestone, Eglwyseg rocks, near Llangollen, Denbighshire: Leight. 
Exs. no. 94, sub Z. albo-cerulescens, var. immersa, Fr. Spermogones abound as promi- 
nent black cones, scattered along the black, irregular, hypothalline boundary-line of the 
