492 Proceedings of the Royal Irish Academy. 



4. Metzgeria hamata Lindberg. 



Metzgeria hamata Lindberg, Soc. F. Fl. Perm., 1874. Jungermania 

 furcata var. elongata Hook., Brit. Jung. tab. 55. Metzgeria hamata 

 Lindberg, Monogr. Metzg., p. 25, fig. 5. Metzgeria linearis non Aust., 

 Lindberg, Hepat. Hib., p. 494, 1875. Metzgeria hamata Pearson, 

 Hepat. Brit. Isles, p. 464, plate 207. 



Districts I. YIII. . 



Hah. — On the ground among mountain heaths, on damp banks, 

 and by the sides of streams, often submerged. 



I. Stream on Brandon, 1865: Moore; and 1897: Lett & McA. 

 Cromaglown, Killarney, 1873 : Lindberg 1875 ; and 1878 : McA. Tore 

 Waterfall, and Ma gilli cuddy's Eeeks at 2500 ft. : Scully 1890. Tore 

 Waterfall, Sept. 1897 : McA. & Lett. On damp peat on the ascent to 

 Brandon near Cloghane, and on Mt. Eagle, July 1881 : F. W. M. & 

 McA. Bank of the Coumanare Lakes near Connor Hill, and at 

 Loughanscaul near Dingle, Sept. 1S98 : Lett & McA. 



VIII. Bangore, and on the slopes of Devil's Mother, Sept. 1901 : 

 Lett. 



Order 2. MAECHANTIACE^. 



Genus 42. Marchantia March, fil. 



Marchantia polymorpha Linn., Sp. PL, p. 1603, 1753. 



Marcbant fil., in Acta Gal., 1713. Dill., Muse, tab. 76-77, fig. 7. 

 Eng. Bot., tab. 100. Tayl., in Fl. Hib., pt. ii., p. 49. Moore, Irish 

 Hepat., p. 601. Pearson, Hepat. Brit. Isles, p. 466, plate 208. 



Districts I. lY. V. VI. — VIII. — X. XL XII. 



JSab. — By the sides of streams, drain banks in bogs, old damp 

 walls. Flourishing on the surface mould of pot-j)laiits in gardens. 



I. Duukerron, Co. Kerry : Taylor 1836. Frequent on moist rocks, 

 seldom fi'uiting : Carrington 1863. Common in the Dingle Peninsula : 

 McA. 1901. 



IV. Lough Bray: McA. 1890. Altadore Glen : McA. 1889. 



V. Old damp wall near Drumcondi'a, Co. Dublin, 1878: McA. 

 Anglesey Mtn., Co. Louth : Lett 1890. 



VI. Co. Clare and Co. Limerick: Stewart 1890. Ballyvaughan : 

 McA. 1895 a. Drain on Sheep-pool Bog, Clonbrock, Co. Galway, 

 abundant, male and female : McA. 1896 l. Abundant on the bog 

 near Geashill railway station, King's Co., fertile : McA. 1892 a. 



VIII. River bank, Westport, Sept. 1901 : McA. 

 X. Camlough Mtn., Co. Armagh, 1897: Lett. 



