352 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



portion of available rock, so that it is impossible to walk 

 in places without treading- on the nests. The birds showed 

 considerable reluctance to leave their nests, but none of 

 them remained long- enough to permit of being caught 

 with the hand. The view from the top of the Stack is a 

 very striking one, and the immense number of Gannets 

 soaring in all directions around from the level of one's eye 

 right down to the sea, furnished a most exhilarating 

 spectacle. After leaving Stack Lii, we proceeded to Stack 

 an Armin, where I anticipated lauding without difficulty, 

 as the sea was comparatively calm ; but though the land- 

 ing on this Stack presents no special difficulty when the 

 wind is in the proper quarter, the north-west, it is only 

 when the wind is in that quarter that this can be accom- 

 plished. On this occasion the wind was in the north-east, 

 and when we arrived at the strait between Boreray and 

 Stack an Armin, we encountered, to my surprise, a really 

 heavy sea, and any attempt at landing on the Stack was 

 entirely out of the question : it took us, indeed, all our 

 time to steer the boat safely round the point of Boreray. 

 Although Stack an Armin is both higher and more 

 extensive than Stack Lii, the climb is said to be quite 

 easy, and not nearly so interesting as that of Stack Lii, as 

 on one side the locks slope gradually all the way up. 

 Gannets are very abundant, whitening flip top and sides 

 of the Stack, but they are not so numerous as on Stack Lii. 

 There are, however, more Guillemots and Razor-hills 

 than on the latter Stack, the Razor-bills being particularly 

 abundant, and constituting a very extensive colony. The 

 row round Boreray is a very interesting one, the cliffs on 

 the west and north-west sides being particularly fine, 

 lowering up in pinnacled masses to a height of from 1,000 

 to 1,100 feet, the pinnacled tops being clothed witli a 

 bright yellow lichen. Gannets are very numerous, nest- 



