624 Proceedings of the Royal Irish Academy. 



at the base, or none, increasing in size towards the middle of the 

 stem, and decreasing from the middle to the apex, succubous, 

 secund, roundish-ovate, with the points sometimes slightly emar- 

 ginate. Amphigastria larger and more readily observed than 

 they are in the former species, confined to the younger branches. 

 Colesule cylindrical, fringed at the mouth. 



Jungermannia denudata, ISTees, in Mart. Fl. Crypt. Erlang. p. 14; 

 Lindenb. Synop. Hepat. Europ. p. 71, n. 69; Hartm. Skand. Fl. 

 3 ed. p. 319. Odontoschisma denudatum, Dumort. Recueil, 1, 

 p. 19 ; et Hepat. Europ. p. 108. Jungermannia sphagni. Hook. 

 Brit. Jung, suppl. t. 3 ; Ekart, Synop. Jung. Grerm. t. 6, f. 48. 

 Sphagnoecetis communis, (3. macrior, Nees, in G. L. et 1^. Synop. 

 Hep. p. 149. 



Hab. On rotten trunks of trees, and in wet places in shady woods. 

 On the side of Corslieve Mountain, near Bangore, Co. Mayo (1859). 



Cephalozia, Dumortier. 



Jungermannia, Mich. J^ov. PI. Gen. p. 9, no. 5, tab. 6, fig. 17 (1729) ; 

 Hook. Brit. Jung. (1816). Cephalozia, Dumort. Becueil, 1, p. 18, 

 n. 21 (1835). Zoopsis, Hooker, in Tayl. Crypt. Fl. Antarct. 

 p. 55 (1845). Trigonanthus, Spruce, ia Trans. Bot. Soc. Edinb. 3, 

 p. 207 (1849). 



" Involucre polyphyllous, gemmiform, bracteolge deeply lacerated, 

 imbricated in several rows all round the stem and base of the cole- 

 sule, exterior, stipuliform. Colesule sessile, erect, round, inflated, 

 contracted at apex, mouth toothed. Capsule 4-valved, of thick 

 consistence, naked. Elaters geminate, naked, deciduous." — 

 Dumortier. 



(ff). Amphigastria prese7it. 



1. C eplialo%ia Francisci, ~S.ook. (J)vimort.) Stems nearly erect, slightly 



branching. Leaves incumbent, ovate, acutely emarginate. Amphi- 

 gastria minute, ovate, bifid. Colesule terminal, on short lateral 

 branches. 



Jungermannia Francisci, Hook. Brit. Jung. t. 49 ; Engl. Bot. t. 2369 ; 

 Taylor, in Fl. Hib. 2, p. 64 ; Nees, Europ. Leberm. 2, p. 220 ; 

 G. L. et N. Synop. Hepat. p. 133; Eabenhor. Hepat. Europ. 

 exsic. n. 503. Cephalozia Fi'ancisci, Dumort. E,ev. Jung. p. 18 ; 

 Hepat. Europ. p. 88 ; Cogn. Hepat. Belg. p. 35. 



Hab. Shady banks and rocks. Near Bantry, Miss Hutchins. Very 

 rare in Ireland. 



2. Cephalozia divaricata, Smith (Dumort.) Autoecious. Stems creeping. 



Leaves roundish and semi-bifid, segments divergent. Amphi- 

 gastria subulate, bifid. Colesule terminal, cylindrical, truncate, 

 toothed at the mouth. 



