APPENDIX I. 13 



Tribus XXIX. — Biatore\ t opside,e. 



Thallus arnorpho-crustaceus ; gouidia cliroolepoidea ; apothe- 

 cia biatorina, ab origine a thallo libéra et aperta, 



71. Biatorinopsis ; sporae transversim divisée, hyalinae. 



Tribus XXX. — Byssocaule.e. 



Thalli hyphae discreto-laxse at reticulatim anastomosantes, 

 hyphernoideo-asperae ; gonidia depauperato-chroolepoidea; apo- 

 thecia lecanorina. 



72. Byssocaulon, sporae transversim divisae, hyalin«. 



Tribus XXXI. — Cœnogonie.e. 



Thalli hyphae gonidia confervaceo-filiformia discreto-obtegen- 

 tes iisque arcte adnatae et iiscum filamenta libéra caespitose cres- 

 centia formantes; apothecia biatorina. 



73. Cœnogonium, sporae transversim divisae, hyalinae. 



Tribus XXXII. — Thelotreme.e. 



Thallus crustaceus; gonidia chroolepoidea; apothecia lecano- 

 rina, urceolaria, persistenter thallino-cincta. 



* Apothecia in thallo sparsa. 



74. Ocellularia, sporse transversim divisae, hyalinae, loculi lentiformes. 



75. Thelotrema, sporae parenchymatöse, hyalinae. 



76. Phaeotrema, sporae transversim divisae, fuscae, loculi lentiformes. 



77. Leptotrema, sporae parenchymaticae, fuscae. 



** Apothecia in stromatibus aggregata. 



78. Tremotylium, sporae parenchymaticae, hyalinae. 



Tribus XXXIII. — Odontotreme.e. 



Thallus crustaceus; gonidia (verisimiliter chroolepoidea); apo- 

 thecia lecideino-thelotremoidea, primum thallino-tecta, margine 

 dentato-rumpente dehiscentia. 



79. Odontotrema, sporae transversim divisae, hyalinae, loculi lentiformes. 



