Fig. 26. 
Fig. 97. 
Fig. 28. 
Fig. 29. 
Fig. 30. 
Fig. 31. 
Fig. 32. 
Fig. 33. 
Fig. 34. 
Fig. 35. 
Fig. 36. 
Fig. 37. 
Fig. 38. 
Fig. 39. 
PYCNIDES OF CRUSTACEOUS LICHENS. 
Exs. No. 245: sterigmata and sper- 
matia. 
Calicium disseminatum, Fr., Schærer’s 
Exs. No. 504: spermatia. 
Ditto, var. viridulum, Fr., Schzrer's 
Exs. No. 295: sterigmata and sper- 
matia. 
Ditto (type), Nylanders Exs. No. 8: 
spermatia. 
C.trachelinum, Ach., Hepp's Exs. No. 160: 
ditto. 
Ditto, Schærer’s Exs. No. 8: sterigmata 
and spermatia. 
Ditto, Bury : spermatia. 
Calicium quercinum, Pers., Blaeberry Hill: 
ditto. 
Ditto, var. lenticulare, Ach., Schærer’s 
Exs. No. 505: sterigmata and sper- 
matia. 
C. tympanellum, Fr., Schzrer's Exs. No. 
: ditto. 
C. stigonellum, Fr., Leighton's Exs. No. 
226 : sterigmata, spermatia, and sper- 
mogonal filaments. 
C. tigillare, Fr., Hepp's Exs. No. 159: 
sterigmata and spermatia. 
C. pallidum, Pers., Schærer’s Exs. No. 7 : 
sterigmata and spermatia. 
C. eusporum, Nyl.: stylospores. 
Verrucaria epidermidis, Ach., var. ana- 
lepta, Ach., Crinan Canal: sterig- 
mata and spermatia. (Vide also 
Plate XIV. fig. 30.) 
. Pyrenothea verrucosa, n.sp., Castleber- 
nard: a, thallus, showing the interas- 
sociated spermogones and young apo- 
Fig. 
ig. 47. 
. 48. 
. 53 
. 54 
313 
thecia; 5, portions of thallus, variously 
magnified, showing ditto; c, sections 
of thallus, showihg ditto; d, sterig- 
mata and spermatia. 
. Pyrenothea lithina, Leight., Ireland: a, 
thallus, showing spermogones ; 5, por- 
tion of thallus, magnified, showing 
ditto; c, section of thallus, showing 
ditto. 
. Pyrenothea, Kinnoull Hill, Perth. 
. P. vermicellifera, Kunz, Hepp's Exs. No. 
110: sterigmata and spermatia. 
. Ditto, Hepp's Exs. No. 110: stylospores. 
Ditto, Leighton's Exs. No. 102 : sterig- 
mata and spermatia. 
. Ditto (=Verrucaria or Pyrenothea apha- 
nes, Borrer), in Kew herb. : spermatia. 
P. (=Verrucaria) aphanes, Kew herb. : 
ditto. 
P. hippocastani, Leight., Leighton's Exs. 
No. 165: sterigmata and spermatia. 
. P. cellulosa, Flot., Germany, Kew herb. : 
basidia and stylospores. 
Pyrenothea, Slane's Castle, co. Antrim : 
sterigmata and spermatia. 
. P. (= Verrucaria or Thrombium) niveo- 
atra, Borr., Bramber, 1814: sper- 
matia. 
Pyrenothea, accompanying Lepra can- 
delaris, L., Scherer’s Exs. No. 233: 
sterigmata and spermatia. 
. P. (=Thrombium) stictica, Fr., Hepp's 
Exs. No. 111: ditto. 
. P. (Cliostomum) corrugata, Mass., Hepp's 
Exs. No. 228: a,sterigmata ; 5, sper- 
matia; c, stylospores, 
