16 THE DISTRIBUTION OF HEPATIC IN SCOTLAND 
there, but one Atlantic species, Plewrozia purpurea, which 
atfects wet exposed moors, is found in quantity in the 
northern parts of the mainland. The Atlantic species are 
in general scarce on the exposed Orkney and Shetland 
groups of islands, but they are more in evidence there than 
on the northern mainland. 
Our Atlantic species may be divided as follows, as far as 
our knowledge of their distribution allows in the meantime. 
1. Species known only on the western watershed : 
Sphenolobus Pearsoni. Colurolejeunea calyptrifolia. 
Acrobolbus Wilsonii. Cololejeunea minutissima. 
Plagiochila tridenticulata. Lejeunea Macvicari. 
Adelanthus decipiens. Drepanolejeuneahamatifoha. 
Lepidozia pinnata. Harpalejeunea ovata. 
Radula voluta. Marchesinia Mackaii. 
R. aquilegia. Jubula Hutchinsiee. 
R. Carringtonii. Frullania microphylla. 
Sphenolobus Pearsoni extends inland to the Kells range 
of hills in Kirkeudbrightshire. This minute subalpine and 
alpine species, which is apparently confined to granite, will 
perhaps be found on the Eastern Grampians. Radula 
aquilegia extends inland to New Galloway. Harpalejewnea 
ovata is more frequent inland and extends rather further 
than the others of its group. 
2. Species also on the east coast near the sea-shore, but 
not inland : 
Lophocolea spicata. Frullania germana. 
The first of these is almost contined on the west coast to 
rocks on the shore. The only known locality for it on the 
eastern side is in a ravine close to the shore in Berwick- 
shire. The second is frequent on rocks on the shore of the 
west coast. Its eastern locality is on the Isle of May. 
3. Species extending for a short distance over the western 
watershed into the eastern : 
Plagiochila punctata. Scapania nimbosa. 
Leptocyphus cuneifolius. Cololejeunea microscopica. 
Mastigophora Woodsii. 
