494 Proceedinya of the Eoyal Irish Academy. 



Genus 45. Preissia Corda. 

 Preissia commutata LindenlDerg, Xees. 



Marchantia IwmisplKBrica Li'iin., Fl. Suec, no. 1052. Marchantia 

 androgyna Tayl., in Trans. Linn. Soc, xvii., p. 380, 1835. Preissia 

 coinmutata Xees, Xat. Eur. Leb., iv., p. 117. Chomiocarpon qiiadratus 

 Scop., Liadb., Muse. Scand., 1879. Preissia commutata Moore, Irish. 

 Hepat., p. 602. Pearson, Hepat. Brit. Isles, p. 473, plate 211. 



Districts I. T. Till. XI. XII. 



So}). — In fissures of damp rocks, and on damp gi'ound in moun- 

 tainous places, more frequent in limestone districts, occasionally at 

 sea-level on damp sandy flats, among sand-hills. 



I. Killamey : Moore. Eavine below the Eagle's Xest, 1863: 

 Carrington. Dunkerron: Taylor. Kenm.are (W. Wilson) : Carrington 

 1863. 



T. Xorth Bull near Dublin, and in Co. Ealdare : Moore. Railway 

 bridge over Eyewater Eiver, Leixlip, Co. Xildare : McA. 1893 h. 



VIII. Eocks above Kylemore Castle and by the side of the lake at 

 Letterfrack, 1874 : Moore. Abundant near Cong, Co. Galway : Moore 

 1876. 



XI. In the crevices of rocks, Goat Island, Lough Eask, June 1903 : 

 McA. MiRfield, Buucrana, and behind Batt's Wood, 1903: Hunter. 



XII. Sallagh Braes, Co. Antrim, 1 837 : Moore. Cregagh Glen 

 and Carr's Glen : Stewart 1 888. Scarva demesne and Parkmore (Lett), 

 Glendun, Co. Antrim (Brenan) : Stewart 1895. 



Genus 46. LuiiTilaria. 

 Lunnlaria crnciata Linn., Dumort. 



Liinularia vulgaris Mich., Xov. Gen., p. 4, tab. 4, 1741. JIarchantia 

 cruciata Linn., Sp. PI., p. 1137. Lunularia cruciata Dumort., Coinm., 

 p. 116. Moore, Irish Hepat., p. 604. Pearson, Hepat. Brit. Isles, 

 p. 476, plate 212. 



Districts I. IT. T. — TIL X. XI. XII. 



Hah. — On damp walls and banks, pathways, (S:c., exceedingly 

 common in gardens. Tery rare in fruit. 



I. Dunkerron, Co. Kerry, fertile in August: Taylor 1836. Tore 

 Waterfall, KiUamey, 1873 : Lindberg 1875. Plentiful on the wall 

 and on the ground at the entrance to glen at Tore Waterfall, Sept. 

 1897 : McA. &Lett. Xear Kenmare : Carrington. Eoss I., on wall- 

 tops, banks, and pathways, 1893: McA. 1900. Old walls about 



