Mc Ardle — On the Eepaticce of the Hill of Howth. 113 



obtuse or sub-acute teeth. Cells small, sub-equilateral (present- 

 ing a beautiful microscopic object). (Stipules) folioles, balf 

 as long as the leaves, ovate, lanceolate, obtuse, or bidentate. 

 Bracts in threes, inner series three times larger than the leaves, 

 ovate, oblong, with erect base ; apex, bifid to ^ ; segments, 

 lanceolate, obtuse, recurved; small bracts, subspinose. Perianths 

 twice as long as the bracts, narrowly ovate, fusciform, three- 

 keeled almost from the base ; mouth, six plicate, repand, three 

 cells thick at the base, and in the middle two cells thick. 

 Calyptra, dimidiate, two cells thick below. Capsule large, 

 brown, ovate, cylindrical. Androecia occupying the apex or 

 middle of the stem or branch, a little broader and shorter than 

 the bract leaves, and very concave. 



On account of the whole habit, flagellse, concave leaves, 

 small cells, &c., it clearly approaches Cephalozia denudata. 

 There also occur frequently in barren plants erect branches, 

 the leaves gradually becoming smaller to the apex, bearing rose 

 coloured propagula at the summit, quite similar to the gemmi- 

 parous branches of C. denudata. "Very rare, probably not 

 previously found in Ireland. Side of a shallow channel on 

 a small bog near the Bally kill plantation (sparingly fertile). 



8. * Cephalozia fluitans (^eQs). — Jungermania Jluitans, Nees, in Syll. 

 Eatisb. (1823), p. 129. J. fluitam, Funck. Cr. Gew. No. 593, 

 J. injiatajiuitans, Nees, Eur. Leberm. J. mflata, laxa amhi- 

 gua (amphigastriata !), G. L. et N. Syn. Hepat. 106. Jung, 

 francisci, Eng. Bot. t. 2569. Cephalozia oMusiloha, Lindberg, 

 Not. 1872. C. fluitans, Carr. et Pearson, Hep. Brit. Exsicc, 

 Fasc. 3, No. 178. 



This fine and most distinct species is rare, or most probably 

 overlooked in Ii-eland, and confounded with J. inflata. It is 

 fairly well figured in English Botany under the name of 

 J. francisci, from which it is abundantly distinct. My own 

 acquaintance with this plant dates many years back, when I 

 gathered it on Bracklin bog in the Co. Westmeath, growing on 

 Sphagnum in a part of the bog which was often submerged, I 

 named it C. cladorhizans, Spruce, one of the synonyms which 

 it bears, having identified it with a specimen collected by 

 Dr. D. Moore, in the Co. Galway. Though the specimens I 

 collected were imperfect, I made a drawing of it which is 

 included with others in a paper which I read before the 



R.I. A. PKOC, SEK. III., VOL. Ill, I 



