424 TRANSACTIONS OF THE [Sess. lxxix. 



Annals of Scottish Natural History l I have already spoken 

 of the similar, or rather of the almost identical, habitats of 

 other two remarkable mosses, viz. Myurium Hebridarum 

 (Sch.) and Hedwigidium imberbe (Smith). Since then the 

 latter of these two has been found in Scotland where it 

 had previously been long sought in vain. The first station 

 is close to Loch Awe, and in 1905 near Arisaig three others 

 in rather close series were found. Besides these, two others 

 might be associated with them, viz. CampylojDUs Shawii 

 (Wils.) and Glyphomitrium Daviesii (Dicks.), the former 

 confined strictly within the limits, the latter diverging a 

 little towards the east, as on Bowling Hills, etc., but reach- 

 ing Wales and extending, although sparingly, to the Island 

 of Lewis. 



I might have added others by way of strengthening my 

 views of the peculiar part played in the world's history by 

 this peculiar strip of land, but sufficient has been stated 

 for my present purpose. I now revert to the group which 

 plays the most important part in this respect. 



This group may fairly well be placed under one genus, 

 as Dr. Braithwaite has done, viz. under Leptodontium at 

 p. 255, vol. i, of his work on British Mosses. 



Leptodontium flexifolium (Dicks.). 

 „ recurvi/oUiim (Tayl.). 



gemmasce7is (Mitt.). 

 „ terrenum (Stirn.). 



„ Rossii (Stirn.). 



The first moss has been known for more than a century, 

 and its area of growth is accordingly more extended as it 

 has been detected in two places on the continent of Europe, 

 but by far the main sources of supply are the western 

 parts of Great Britain. It is the only member hitherto 

 found in fruit. It is also much smaller than the others, 

 but its structure, as viewed under the microscope, connects 

 it rather closely to the rest of the group ; the second has 

 been known for more than half a century, and remained 

 for many years the only instance of its class ; the third 

 differs widely from the rest inasmuch as it produces pro- 

 pagula at the apices of the leaves much as in Ulota 

 1 Ann. Scot, Nat. Hist., 1907, p. 42. 



