296 Proceedings of the Royal Irish Academy. 



Hal. On the trunks of trees, damp shaded banks, on rocks 

 among moss, and on stones near streams, veiy common, from 

 sea level to the summit of the highest mountains. 



Var. planiiismla, Lindherg. Elongate, about 1 m.m. wide, 

 pale or green pellucid, when dry shining, less branched^ 

 intricate and fragile, planiuscula, leaves more or less remote, 

 antical lobe convexulous slightly decurved, obliquely ovato- 

 oval rotundato obtuse, margin entire, postical lobe 5-7 times 

 smaller, stipules subadpressed, 2 to 3 times larger than the 

 postical lobe, convexiuscula, rotundato-oval, sinus more or less 

 broad and obtuse, segments somewhat obtuse, margin entu-e, 

 perianth elliptic-clavate, below terete, upper part 5 plicate, 

 angles complanate, margin smooth, {Lindherg.) 



Sab. On rocks among mosses. Connor hill, Lindherg and 

 Moore, 1873. 



Yar. cavifolia, Lindherg. Smaller and often yellowish-pale 

 or green, very ramose, intricate and fragile, convex, leaves 

 closely imbricate, antical lobe obliquely broadly ovate-oval, 

 very obtuse, apex distinctly narrower, but never acute, entire, 

 postical lobe 3-5 times smaller, cells very chlorophyllose and 

 thickened, trigones distant, stipules subadpressed, as large or 

 larger than the postical lobe, convex, oval rotund, perianth 

 narrower at the base, oval pyriform upper part 5 plicate. 

 {Lindlerg.) 



Sal. On a turfy bank among rocks between Emalough and 

 Inch, Lett and McA., May, 1899. 



Yar. heterophylla, Carrington. Plant very fragile, branches 

 attenuated, leaves small, variously shaped, with the lobule 

 present or obsolete, alternate, distant, chlorophyllose. 



Sab. On wet rocks among mosses, frequent. 



Yar. prolifera, McArdle. Stems prostrate and copiously 

 branched as in the type, lower leaves with adventitious buds on 

 the margins, often well developed into fully formed plantlets, 

 having leaves, stipules, and root hairs. Irish JN'aturalist, vol. 

 iv., plate 3, figs. 3, 4, 5, 6, 7, April, 1895. 



Sal. On decayed bark in Hickson's "Wood, near Anascaul, 

 D. McA., May, 1894. 



4. Lejeunea jyatens^ Lindherg, Acta. Soc. Fenn. Hep. Hib. x., p. 

 482, 1875. Moore, Irish Hepaticse, p. 615, with excellent 

 figiu-e. Plate 43, Proc. E.I.A., vol. 2, 1876. 



