PYCNIDES OF CRUSTACEOUS LICHENS. 305 
Fig. 19. L. sophodes, Leighton's Exs. No. 146: 
sterigmata and spermatia. 
Fig. 20. L. as Ach., Hepp's Exs. No. 83: 
ditt 
Fig. 21. L. e Wahl., Kerry: ditto. 
Fig. 22. L. ferruginea, Huds., Ardrum: a, por- 
tions of thallus variously magnified, 
showing apothecia (bearing pycnides), 
and spermogones ; 5, sections of thal- 
lus, showing ditto; c, section of one 
of the apothecia, showing position of 
one of the pyenides ; d, spermatia and 
sterigmata ; e, stylospores and basidia. 
Fig. 23. Ditto, Cork: spermatia. 
Fig. 24. Ditto, Scherer’s Exs. No. 583: ditto. 
Fig. 25. Ditto, Clatchart: sterigma, with sper- 
matia. 
Fig. 26. Ditto, Crosshaven: spermatia. 
Fig. 27. Ditto, Glenfarg: ditto. 
Fig. 28. L. Lallavei, Clem., Cork: 
: thallus, showing apothecia and sper- 
I 
a, portion of 
mogones ; b, section of thallus, show- 
ing ditto; c, spermatia. 
Fig. 29. Ditto, Scherer’s Exs. No. 584: sper- 
matia. 
Fig. 30. L. aurantiaca, Lightf., var. salicina, 
Schrad.; Leighton's Exs. No. 212: 
sterigmata and spermatia. 
Fig. 31. L. aurantiaca, Berwickshire: spermatia. 
Fig. 32. Ditto, Clonmell: ditto. 
Fig. 33. Ditto, var. salicina, Scherer’s Exs. No. 
537 : ditto. 
Fig. 34. L.calva, Dicks.,var. irrubata, Ach.: Leigh- 
ton's Exs. No.213: sterigmata and sper- 
matia. (Vide also Plate XIII. fig. 14.) 
Fig. 35. L. cerina, Ach., Cork, No. 2: a, section 
of a spermogone; b, sterigmata and 
spermatia. 
Fig. 36. Ditto, Scherer’s Exs. No. 219: sterig- 
mata and spermatia. 
Fig. 37. L. callopisma, Ach., Blackrock : spermatia. 
Fig. 38. L. ventosa, Ach., Morchone: sterigmata 
and spermatia. 
Fig. 39. Ditto, Lochnagar: ditto. 
Fig. 40. L. cervina, Pers., var. sinopica, Sch., 
Leighton's Exs. No. 255: a, section 
of one of the spermogones ; 5, sterig- 
mata and spermatia. 
Fig. 41. L. hematomma, Ach., Leighton's Exs. 
No. 214: a, portion of thallus, show- 
ing spermogones ; à, c, sterigmata and 
spermatia. 
PLATE X. 
Illustrative of the genera Urceolaria, Ach., Pertusaria, DC., and Lecidea, Ach. 
Fig. 1. Urceolaria scruposa, Ach., var. arenaria, 
Sch., Nylander's Exs. No. 46: sterig- 
mata and spermatia. 
Fig. 2. Ditto, var. cretacea, Scherer, Exs. No.291: 
ditto. 
Fig. 3. Pertusaria glomerata, Sch., Kew herb.: 
a, portion of thallus, showing apo- 
thecia, spermogones, and the parasitic 
Verrucaria pygmea, Korb. ; 
thecia and spermogones, isolated; € 
b, apo- 
sterigmata and spermatia; d, sporidia 
of the Verrucaria. 
Fig. 4. Ditto, Ben Lawers : a, an apothecium, and 
b, spermogones, isolated and magnified; 
c, sterigmata and spermatia. 
Fig. 5. P. ceuthocarpa, Sm., Kerry: 
and spermatia. 
sterigmata 
Fig. 6. Lecidea contigua, Fr., co. Antrim, Ireland : 
a, portions of thallus, variously mag- 
nified, showing apothecia and spermo- 
gones; 4, section of thallus, showing 
ditto; c, sterigmata and spermatia. 
Fig. 7. Ditto, Norman Law : sterigmata and sper- 
matia. 
Fig. 8. Ditto, Leighton's Exs. No. 155: ditto. 
Fig. 9. Ditto, var. turgida, Sch.: Derrycunihy: 
a, Portions of thallus, variously mag- 
nified, showing apothecia and spermo- 
gones; 4, section of thallus, showing 
ditto; c, sterigmata and spermatia. 
Fig. 10. Ditto, var. turgida, Blackcairn : 
mata and spermatia. 
Fig. 11. Ditto, var. turgida, Craig Rossie: ditto. 
Fig. 12. Ditto, var. turgida, Cork: ditto. 
sterig- 
