658 Proceedings of the Royal Irish Academy. 



at the margin, erecto-patent, entire. Colcsixle subterminal, oblong, 



angulate, mouth contracted, toothed. 

 Jungermannia hyalina, Lyell, in Hook. Brit. Jung. tab. 65 ; Lindenb. 



Synop. Hepat. p. 67 ; Dumort. Syll. Jung. p. 50 ; Gr. L. et N. 



Synop. Hepat. p. 92 ; Cooke, Brit. Jung. p. 8, fig. 61 ; Engl. 



Bot. suppl. t. 2678. Aplozia hyalina, Dumort. Hepat. Europ. 



p. 58. Nardia hyalina, Carring. in Brit. Hepat. p. 35, pi. 11, 



fig. 36. 

 Hab. Moist banks, and by the sides of streamlets in rocky places. 



Seefing Mountain, Dublin. Aooreagh river, near Sneem, Kerry, 



Dr. Taylor, in El. Hib. Brandon, "W. Wilson, Luggielaw, and 



Seven Churches, Wicklow. J^ot very common in Ireland. 



ADELA:NTHirs, Mitten. 



Jungermannia, Dicks. PI. Crypt. (1783). Hook. Brit. Jung. (1816); 

 Eadula, sect. 3, Plagiochila, Dum. Syll. Jung. Europ. p. 43 

 (1831). Plagiochila, Dumort. Recueil, 1, p. 15 (1835). Gym- 

 nanthe, Mitten, in Journal Linn. Soc. p. 166 (1863). Adelanthus, 

 Mitten, in Journal Linn. Soc. 7, p. 243 (1864). Odontoschisma, 

 Lindb. Soc. Eaun. et El. Eenn. 13, pp. 357-363 (1874). 



Perianth on short ventral shoots at the base of the branches, tubulose,. 

 mouth connivent, subtrigonous, dentate. Involucral bracts tri- 

 farious. Antheridia in the axils of perigonial leaves which are 

 spicate. Stems procumbent below, stoloniferous, leafless, branches 

 erect, curved, simple. Leaves distichous, almost vertical, dorsal 

 margin decurrent. 



Adelanthus decipiens (Hook.), Mitten, Dioecious. Stem erect, the 

 upper leaves subcompresscd, larger, rotundate, the lower ovate, 

 all of them marginate, reticulated with irregular spiniform 

 teeth. Amphigastria thick, short, subulate. Colesule on short 

 ventral shoots, tubulose, ventricose, mouth connivent, ciliate- 

 dentate. Antheridia in the axils of perigonial leaves of the male 

 plant. 



Jungermannia decipiens. Hook. Brit. Jung. tab. 50; Engl. Bot. 2566 ; 

 Nees, Hep. Eur. 1, p. 159. Plagiochila decipiens Dumort. Eev. 

 Jung. ; G. L. et N. Synop. Hepat. p. 24 ; Gottsche et Kabenhor. 

 Hepat. Eur. p. 213. Lindenb. Spec. Hep. p. 51, n. 29, tab. 12, 

 figs. 1-3. Eadula decipiens, Dumort. Syll. Jung. p. 43, p. 15. 

 Gymnanthe decipiens. Mitt., Journ. of Linn. Soc. 7, p. 166. 

 Adelanthus decipiens. Mitt, in Journ. of Linn. Soc. 7, p. 244 ; 

 Gottsche et Eabenhor. Hepat. Eur. essic. n. 474 (cum icone) 

 excellent. 



Hab, Eocky and heathy places near Bantry (Miss Hutchins), Kil- 

 larney, near Glengariff (Dr, Carrington), Glenad, Leitrim. 



