85. Thelopsis Nyl. Thallus scarcely any visible, containing
ohrysogonidia : apotheoia tuberoiiloso-sphorioal, with en tire pyrenium
and numerous 3-septate spores ; spermogones not seen.
86. Obryzum Wallr. Thallus none proper : apothecia on the
thaUus of QoUemei, endooarpoid, with simple or septate corniculate
spores ; spermogones unknown.
T. 87. StrigulaFr. ThaUus maculate, hypophloeodal, seldom efflgu-
rate, _ containing platygonidia : apotheoia subinnate, w ith the
pyrenium usuaUy d cpessèd, and with simple or 1 -3 -sep ta te spores ;
spermogones with th in s tra ig h t spermatia.
88. Melanotheca Poo. ThaUus soaroely an y : apothecia verru-
carioid, numerous and confluent in tho pyrenia, with septate
spermogones n o t observed.
Series V II. P E E IB IO Û E I Nyl. ThaUus th in , often wanting :
apotheoia peridieine, without any ostiole.
Tribe X X I. PEEIDIEI Nyl. ThaUus th in , maculate or none
proper : apotheoia forming a peridium.
89. Theiocarpon Nyl. Thallus crustaceous, thin, verruoose, or
rarely none : apotheoia immersed in th e thaUino verruoæ, with
numerous simple sporos ; spermogones unknown.
90. Endococcus Nyl. ThaUus none proper : apotheoia minute,
globulose, w ith 1 -septate spores; spermogones with th in stra ig h t
spermatia.
91. Mycoporum Flot. ThaUus maculate or obsolete : apothecia
rotundato-difform, containing many hymenia conjoined as in a
common exoiple, with variously septate spores ; spermogones not
observed.
Family IV. MYRIANGIAOEI Nyl. ThaUus unstratifled,
entirely ceUular; thalamium cellular, with superimposed theciferous
c av itie s: fructification no t discrete.
92. Myriangium Mont. & Berk. ThaUus noduloso-pulvinate:
apothecia subleoanorino, with irregularly septate spores; spermogones
no t seen.
TABULAR CONSPECTUS
OF THE
FAMILIES, TRIBES, AND GENERA OF BRITISH LICHENS.
Family I. EPHEBACEI.
Tribo I. SiKOsiPHEi 1. Oonionema Nyl.
. 2. Spilonema Born.
Tribe I I . P t e e n o p s e i 3. Euopsis Nyl.
4. Pyrenopsis Nyl.
Tribe I I I . H o m o p s id e i ...................... 5. EpJiehe F r.
6. EpJieheia Nyl.
Tribe IV. M a g m o p s b i 7. Magmopsis Nyl.
Family I I . COLLEMACEI.
Tribe I . L i c h i n e i 8. Lichina Ag.
9. Lichiniza Nyl.
10. Pterygium Nyl.
11. Leptogidium Nyl.
I n b e I I . CoLLEMEi 12. Synalissa F r.
13. Schizoma Nyl.
14. Collema Wigg.
15. Collemodium Nyl.
16. Leptogium Gray.
17. Bendriscocaulon Nyl.
. 18. Collemopsis Nyl.
Tribe I I I . P t e e n i d i e i 19. Pyrenidium N y l.
Family H I . LICHENACEI.
Series I. EPIOONIODEI.
Tribe I . C a lic ie i ................................ 20. Sphinctrina F r.
21. Calicium Pers.
22. Stenocyhe Nyl.
23. Coniocyhe Aoh.
24. Trachylia F r.
I r i h e l l . S p h æ e o p h o e e i 25. Sphoerophorus P e n .