306 DR. LINDSAY ON THE SPERMOGONES AND 
Fig. 13. L. contigua, var. turgida, Kilcully : ste- 
rigmata and spermatia. 
Figs. 14, 15. Ditto, var. flavicunda, Ach., co. An- 
trim: a, portions of thallus variously 
magnified, showing spermogones; 6, 
sections of thallus, showing ditto: c, 
sterigmata and spermatia. 
Fig. 16. Ditto, var. flavicunda, Ona Mountain, co. 
Antrim: sterigmata and spermatia. 
Fig. 17. Ditto, ditto, Ireland: ditto. 
Fig. 18. Ditto, ditto, Blarney: ditto. 
Fig. 19. Ditto, ditto, Strathmore road : a, one of 
the spermogones, isolated and magni- 
fied; à, sterigmata and spermatia. 
Figs. 20, 21. Ditto, var. platycarpa, Ach., York- 
shire: a, portions of thallus, variously 
magnified, showing apothecia and sper- 
mogones ; 8, sections of thallus, show- 
ing ditto; c, sterigmata and sper- 
matia. 
Fig. 22. Ditto, var. confluens, Sch., Hepp’s Exs. 
No. 125: a, portion of thallus magni- 
fied, showing apothecia and spermo- 
gones; à, some of the spermogones 
isolated and magnified; c, sterigmata 
and spermatia. 
Fig. 23. L. goniophila, Flk., Hepp’s Exs. No. 129: 
sterigmata and spermatia. 
Fig. 24. L. crustulata, Ach., Hepp’s Exs. No. 130: 
ditto. 
Fig. 25. L. exilis, Flk., Hepp's Exs. No. 472-3: 
a, section of a spermogone; 5, ste- 
rigmata and spermatia. 
Fig. 26. L. uliginosa, Ach., Guisborough Moor: 
a, portion of thallus showing spermo- 
gones; 6, section of ditto, showing 
ditto; c, section of one of the sper- 
mogones ; d, spermatia. 
Fig. 27. L. rivulosa, Ach., co. Antrim: sterigmata 
and spermatia. 
Fig. 28. Ditto, Scherer’s Exs. No. 626 : ditto. 
Fig. 29. Ditto, Craig Rossie: spermatia. 
Fig. 30. L. fusca, Borr., Hepp’s Exs. No. 11: 
sterigmata and spermatia. 
Fig. 31. L. calcivora, Ehrh., Leighton's Exs. No. 
94: ditto. 
Fig. 32. L. pineti, Ach., Cleveland: ditto. 
Fig. 33. L. melastigma, Tayl., Dunkerron: sper- 
matia. 
PLATE XI. 
Illustrative of the genus Lecidea, Ach. 
Fig. 1. L. fusco-atra, Fr., Leighton's Exs. No. 
216: a, portion of thallus, showing an 
apothecium and spermogones; 5, ste- 
rigmata and spermatia, 
Fig. 2. Ditto, Leighton's Exs. No. 240: sterig- 
mata, spermatia, and sterile spermo- 
gonal filaments. 
Fig. 3. Ditto, Leighton's Exs. No. 93: sterig- 
mata and spermatia. 
Fig. 4. Ditto, Schærer’s Exs. No. 470 : ditto. 
Fig. 5. Ditto, Craig Rossie and Cliffrigg: a, ste- 
rigmata and spermatia, Cliffrigg; 6, 
spermatia, Craig Rossie. 
. Fig. 6. Ditto, Blackcairn Hill: spermatia. 
Fig. 7. L. parasema, Ach., Rostellan and Ardrum, 
Cork; a, portions of thallus, showing 
apothecia and spermogones; 5, sec- 
tions of ditto, showing ditto ; c, sper- 
matia (Rostellan) ; d, sterigmata and 
spermatia (Ardrum). 
Fig. 8. L. parasema, Leighton’s Exs, No. 183: a, 
portion of thallus magnified, showing 
spermogones; 5, one of the spermo- 
gones isolated and still more highly 
magnified; €, sterigmata and sper- 
matia. 
Fig. 9. Ditto, Corramulzie: sterigmata and sper- 
matia. 
Fig. 10. Ditto, Glen Nevis: ditto. 
Fig. 11. Ditto, Foyers: ditto. 
Fig. 12. Ditto, Kinnoull Hill, Perth : ditto. 
Fig. 13. Ditto, Hepp's Exs. No. 127: a, portion 
of thallus, showing apothecia and sper- 
mogones; b, sterigmata and spermatia. 
Fig. 14. Ditto, Yorkshire: sterigmata and sper- 
matia. 
