M'Ardle — On the Musci and Sepaticce of the Co. Cavan. 611 



the true plant, which authors have had considerable difficulty 

 in separating from Taylor's Zejeunea uUcina, which Dr. Spruce, 

 in his exhaustive work on the Hepaticae of the Amazon and 

 Andees, puts into a different subgenus Microlejeunia. He 

 places Lejeunea minutissima, Smith, and L. microscopica, Taylor, 

 into his subgenus Cololejeunia : they are nearly allied, but quite 

 distinct, L. microscopica having paroecious inflorescence, while 

 L. minutissima is monoecious. Both plants are without foliola 

 or stipules. Lejeunea inconspieua, Eaddi, cannot rank as a 

 species in the Irish list. It is the same as L. minutissima, Smith, 

 Lejeunea ulicina, Taylor, is very distinct from the other two 

 minute plants ; it is dioecious, and has distinct foliola or sti- 

 pules. The figures of Lejeunea minutissima in English Botany, 

 t. 1633, is correct. The excellent figure in Sir William 

 Hooker's British Jungermania, tab. 52, under L. minutissima, 

 is not that species, but Lejeunea ulicina, Taylor. 

 . Radula complanata, Linn. Dum., Hook., Brit. Jung., t. 81. On 

 the trunks of trees, Killakeen, Farnham demesne, shores of 

 Lough Cultra. 

 Radula complanata, L. var. minor, Hook. Slieve Glah, Killakeen 

 woods, in perfect condition, differing only in smaller size, more 

 convex and darker-coloured leaves. 



7. Radula valuta, Taylor., Carrington in Trans. Bot. Soc. Edin., vii., 



p. 455. Radula xalapensis, Lindberg and Moore in Irish 

 Hepaticae. On trees by the shore of Lough Cultra, very rare, 

 not previously found northwards. 



8. Porella platyphylla, L., Lindberg, Hook., Brit. Jung., tab. 40, 



fig. 1 = Madotheca platyphylla, Dumort, Comm. Bot., p. 111. 

 On damp rocks, Killakeen woods. 



9. Cephalozia divaricata, Smith (Dumort), Eng. Bot., t. 719. 



Spruce in Trans. Bot. Soc, Edin. 3, p. 207. Slieve Glah, 

 sparingly. 



10. Cephalozia Lammersiana, Huben, Hepat. Germ. 185. Jungermania 



hicuspidata, English Botany, t. 2239. Damp, boggy places, 

 Ballyhaise woods, Slieve Glah. 



11. Cephalozia hicuspidata, Linn., Hook. Brit. Jung., t. 11, et. supp., 



t. 4. On decayed wood, shores of Lough Cultra, Slieve Glah. 

 Cephalozia hicuspidata, var. setulosa. Spruce, Killakeen. A 

 curious dwarf of reddish-coloured form occurs near the summit 

 of Slieve Glah. 



