\ 



L 



LICHEX-FLOEA OF XORXIIEBy ErKOrE. 397 



9. Solorina crocea^ L. 

 . 10, 'Farmclia lanata^ L. 



11. Phi/scia aquilay Acb, 



12. Tlmbilicaria cylindncciy L. 



13. Pannaria mitscorwn^ Ach. 



14. Lecidea fusco-lutca, Dicks. 



15. L, conjluens^ Ach., pr. p. 



16. i. viridescens, Ach. 



17. Eiidocarpon miniatum^ Acli. 



It lias to be remarked, in regard to the lists quoted from Landt 

 and Sir "W. C. Trevelyan, that inasmuch as the names assigned 

 ty these authors depended on external or naked-eye characters 

 alone, without microscopical examination and reference to the 

 nature of the spores, it is impossible to guarantee the accuracy 

 of the modern synonymy offered. This has been already illus- 

 trated in the case of what was called by the earlier lichcnologists 

 Golleina spongiosum ; and it may be further illustrated by such 



fi 



nil 



I'eaUy different (though allied) lichens, and each of which may 

 liave included more than one species. In the absence of mi- 

 croscopical examination it is impossible to distinguish from each 

 other many of the lower or crustaceous lichens, which have very 

 similar external characters ; from which it follows that lists drawn 

 up without reference to the characters of the spores at least, are 

 L-ertain to omit many species that would otherwise be included j 

 in other Avords, they are inadequate or imperfect representatives 



of the special Lichen-flora they are designed to illustrate. 

 The lichens I collected about Thorshavn amount to 26 



The additional number contained in Laudt's list is 21 



'^d iu Sir W; 



17 



Givinsrn total of ^^ 



• ijTiving n toiai oi 



There can be no doubt, however, that this total by no means 

 represents adequately the Lichen-flora of Taro. The lists of 

 Laudt and Trevelyan arc disproportionately small as regards the 

 very lichens which are sure to predominate in such a country— 



liable to be over- 



that is, crustaceous, minute and obscure species, li; ^ 



looked, and requiring careful microscopical examination for their 



discrimination and determination. As in the parallel case of Ice- 



affirming 



ally 



4 



