190 MOSSES, HEPATIOE AND LICHENS. 



With regard to the relation which the Sarnian Moss- 

 Flora bears to that of the British Isles, it may be stated that 

 the mosses now recorded comprise as nearly as possible one- 

 fourth, and the Hepaticce one-fifth, of the entire number 

 known to be indigenous to Britain. 



The names in the following list are for the most part 

 those used in the London Catalogue, second edition, and I 

 have inserted in brackets the names given in Braithwaite's 

 British Moss-Flora wherever they diner materially. This 

 may be useful, as until the publication of a synonymic index 

 it is not always an easy matter to find a familiar species in 

 Dr. Braithwaite's classical work. 



Three mosses will be found in the list which I have not 

 myself seen, viz. : Fissidens exilis, Hypnum molluscum and 

 Bryum mildeanum. They were collected in Guernsey by a 

 French bryologist, Mons. J. Cardot, in September, 1885, and 

 recorded by him in the Revue Bryologique for 1887, in a 

 paper entitled, Mousses recoltees dans les lies de Jersey et de 

 Guernesey. 



The Hepaticm, or Scale Mosses and Liverworts, are so 

 constantly associated with the true mosses in habitat, that it is 

 impossible to take up the study of one group without making 

 the acquaintance of the other. There are, however, difficulties 

 in the way of their systematic study, one of which is the want 

 of a good modern English monograph, after the plan of 

 Wilson's Bryologia Britannica. At present recourse must 

 be had to foreign works in various languages, and to scattered 

 English papers and pamphlets, and this of course does not 

 tend to simplify matters. 



Although the list of Guernsey Hepaticos is not a lengthy 

 one, it includes two species that well deserve special mention. 

 The first is Cephalozia Turneri, a microscopic species, which I 

 had the good fortune to discover in the early part of this year 

 on the cliffs above Fermain Bay. With the exception of a 

 single habitat in Sussex and one in Wales, this little plant has 

 hitherto been supposed to be confined to Ireland, where it is 

 recorded for a few stations in the south. It is one of the most 

 minute of all hepatics, necessitating some patient search and 

 the free use of the lens for its detection among the tiny mosses 

 with which it grows. The second rarity is Lophocolea 

 spicata, also an Irish species, restricted in Great Britain to a 

 single habitat, and that at the western extremity of Cornwall. 

 In one of our moss-hunting rambles Mr. Boswell and I lighted 

 upon it in a shady lane at the Forest, and since then I have 

 found it both at St. Andrew's and St. Saviour's, so that 



