LICHENS AND MOSSES FROM CARSAIG, ARGYLE 43 



Continental as well as Scottish specimens of the latter, the 

 cells shorter near apex and in the excurrent nerve. 



The other moss is a Campylopus which I had previously 

 detected in 1871 ; but as. the small specimen had been 

 lost, and has not hitherto turned up, I refrained from pub- 

 lishing a description of it. It was rediscovered this year in 

 considerable abundance on wettish grassy slopes of one of 

 the lesser hills near Carsaig, at an elevation of not more 

 than 300 feet above sea-level. 



Campylopus melapkanus, n. sp. In dense tufts, dark green 

 above, almost black below ; stems I to 2 inches high, pale 

 brown in a young state, becoming dark brown afterwards, 

 slightly dichotomous or fastigiate near apex, slightly 

 radiculose below, radicles pale ; leaves erecto - patent, 

 straight, frequently in cuspidate tufts at apex, for the most 

 part black -tipped, concave throughout, toothed at apex ; 

 nerve half width of leaf near base, composed of two rows of 

 largish pellucid cells in front, of a corresponding row behind 

 of smaller pellucid cells, and of one intermediate row of 

 small, dark, opaque cells. The cells of the posterior of the 

 two front rows become often dark and nearly opaque, as do 

 also, although less frequently, those of the back row. The 

 wings at the basal angles of the leaves are dilated into 

 auricles of large, thin-walled, colourless cells, which ultimately 

 become slightly brown on the part next the nerve ; the 

 pagina, which nearly reaches the apex, is composed of cells 

 which near the base are oblong, .018 to .028 by .01 to 

 .014 mm.; above, near the apex, they are dense, .009 to 

 .014 by .005 to .008 mm. The nerve becomes brown 

 throughout, although the browning process is first perceptible 

 at the apex. 



This moss has a curious blending of characters belonging 

 to both C. flexuosus and C. Sdnuarzii, The alar spaces 

 exactly resemble those of the latter, as do, to a certain 

 extent, a section of the nerve, and the colour of the radicles ; 

 the other characters resemble more or less closely those of 

 the former moss. The blackening of the stem and nerve is 

 a curious peculiarity, and would seem to connect the moss 

 also with C. atro-vircns. Indeed, the eye is first attracted to 

 it by the black tips of even the young leaves. 



