i io ANNALS OF SCOTTISH NATURAL HISTORY 



especially in those from Tarbert, nearly all the leaves are 

 more or less corrugated or undulated. 



There was also detected a patch of Campylopus mela- 

 phanus, described in the "Annals" for January 1899. 

 Accordingly its area of growth is, in all likelihood, rather 

 a wide one. The following description may be reckoned 

 supplementary to the original. The leaves are shortly 

 acuminated, the apex bluntish, very often slightly cucullate 

 and toothed as well as blackened along with the nerve. 

 Near the base the large quadrate cells with thick walls, 

 which also become quickly blackened as well as the nerve, 

 are characteristic features. The structure of the nerve is 

 somewhat peculiar. The cells of the anterior row enlarge 

 downwards, until near the base they often show a diameter 

 of 1 7 /j,. The sterei'd cells show abundantly on the posterior 

 aspect of the second row of cells, although they are rarely 

 absent anteriorly. The constant presence of the posterior 

 bulging cells downwards, even to the middle of the leaf, is 

 another peculiarity. 



I have still another Campylopus from Tarbert, and, I 

 may add, from Lewis, although the specimens from the latter 

 place are less typical. The peculiarity in this plant is that 

 the nerve is lost below the apex. 



CAMPYLOPUS LEUCOPHyEUS, //. sp.- -Tufts very dense, 

 from one to two inches in height, green above with a pale- 

 white belt beneath, varying in breadth, at times extending 

 nearly to the base, at others occupying only a fourth of the 

 whole, below fuscous ; stems slender, simple or sparsely 

 dichotomously divided, interspersed with pale or reddish 

 radicles ; leaves straight, nearly appressed to the stem or 

 spreading slightly, broadly lanceolate, tapering, bluntish at 

 apex, which is hairless but toothed, at times roundish and 

 scarcely toothed, concave almost tubular from the middle 

 upwards, margin plane ; nerve from a third to a half the 

 breadth of the leaf near the base, tapering and vanishing 

 below the apex, thin, about 32 yu, thick, composed of an 

 anterior row of small irregular cells, 4 to 6 /u, diameter, more 

 constant below, of a middle row of regular cells, pellucid, 

 5 to 9 fj, diameter, of a third row of very small cells, of 

 bulging posterior cells in the upper third, diminishing down- 



