88 Trigonantliese 



The five genera above-described, with the exception of Anthelia, all 

 belong to a tribe called in my MSS. Trigonanthe^, because of the 

 leading character. It comprises the following genera. 



Tribus TEIGONANTHE^. 

 Mytilopsis S. - 



MiCBOPTEKYGIUM NoeS. 



Bazzania Gray. 

 Lepidozia Dumort. 



Eulejndozia S. 



Microlepidoda S. 

 Blepharostoma Dum. 

 Aeachniopsis S. 

 Cephalozia Dum. 



Zoopsis H. f. et T. 



Pteropsiella S. 



Protoceplialozia S. 



Alohiella S. 



Eucephalozia S. 



Cephaloziella S. 



Lemhidium Mitt. 



Odontochisma Dum. 

 Adelanthus Mitt. 

 Anomoclada S. 

 Hygrobiella S. 

 Pleueoclada S. • 



Linnaeus aptly compared the multifarious affinities of genera in an 

 order, and of species in a genus, to the contact of limitrophous 

 countries on a map. Hence, in the collocation of genera in linear 

 series, he often found himself unable to follow his own rule "quae 

 difficilius distinguuntur, propius collocentur". I cannot flatter myself 

 that I have been more successful in the above list of Trigonanthece . The 

 linear arrangement of the subgenera and species of C^pAflio^irt itself can- 

 not be effected without some dislocation of affinities. Eucephalozia 

 approaches, by certain of its species, more or less nearly to other sec- 

 tions of Cephalozia, and through them to sections more remote and to 

 various distinct genera : thus by 



