98 B LYNGE. 



matter will also be made complicated by the many "subspecies, 

 varietas, forma, subforma", in which older authors especially 

 rejoiced, an unbroken record being made by Rabenhorst in his 

 Cladoniae Europaeae and the Supplementum. 



In any case, the names of the labels of the collections will 

 also be found unaltered in the index, and if I decide to attempt 

 a uniform synonymy, the names will be found twice in the index, 

 the altered names with an asterisk, in order that no confusion 

 might arise. 



The index will consist of two parts. The first part will give 

 the collections, arranged alphabetically according to the name 

 of the editor or the title of the collection, with exact title, dates 

 of publication, of fasciculi, numbers of Lichens in each fasciculus, 

 and the names and numbers of the Lichens distributed. For 

 instance: 

 Johnson, The Rev. W.: The North of England Lichen Herbarium. 



Comprising specimens collected mostly in Cumberland, 



Durham, and Northumberland, by the Rev. W. Johnson, 



F. L. S. Fasciculi I— XI, 40 numbers each, 1—440. Fasc. 



I— II Newcastle — upon — Tyne 1894, III— V Darlington 



1895 a. s. o. 



Fasciculus I. 



1. Gonionema compactum Nyl. 



2. Ephebeia hispiduïa Nyl. 



Fasciculus XL 



439. Verrucaria pyrenophora Nyl. 



440. Verrucaria lucens Tayl. 



The second part will give all the species, arranged alphabe- 

 tically according to genera and species with the names of the 

 collections in which the species has been distributed, the number 

 of the species and the names of the author in each case. e. g. 



