McArdle — Additions to the Sepaticce of the Hill of Howth. 115 



5. ChiloscypJms polyanthus, Goxdio.. Hook. Brit. Jung., t. 62. 13y the 



side of a stream in the demesne, April, 1895. 



6. Saccogyna viticulosa, Mich. (Dumort). Hook. Brit. Jung., t. 60. 



On a damp bank, Howth demesne, March, 1895. 



7. "^'Scapania (equilola, Dumort. Carrington's Brit. Jung., p. 81, 



n. 3, pi. 8. fig. 26, ex parte, 1875. In the crevices of the 

 rocks, Ballykill (very fine), 1894-5 ; plentiful in the demesne, 

 April, 1895. 



8. ^'Scapania aspera, Miill. Pearson, in Journal of Botany, December, 



1892, tab. 327. On rocks amongst moss in the demesne, April, 

 1895. 



9. Scapania resupinata, Dumort. E. Bot. t. 2437. Amongst rocks 



in the demesne, April, 1895. 



Scapania resupinata, Dumort, var. recurvifolia, Hook. Brit. Jung., 

 t. 21, fig. 8. On a peaty soil amongst the heather, Ballykill, 

 1894, in the demesne, April, 1895. 



10. PlagiocJiila asplenioides, Linn. (Dumort). Hook. Brit. Jung., t. 13. 



On a damp bank, and on stones in the demesne, bearing 

 perianths, which contained unfertilised archegonia. Male 

 plant smaller, with a stout stem one inch or more in length, of 

 a brown colour, arcuate, flagelliferous at the base, with coj)ious 

 root-hairs, apex suddenly incurved. Leaves distant below, 

 small, obovate or cuneate at apex, increasing in size upwards, 

 more crowded, and overlapping, decurrent at the dorsal side, 

 which has the margin plain to the apex, the ventral ciliato- 

 dentate. Amentse, at the incurved apex of shoots, formed of 

 from four to seven pairs of altered leaves, saccate at the base, 

 overlapping for one-third upwards, and enclosing the anthe- 

 ridia, which are large, obovate to sphserical in shape, with a 

 well-marked hyaline ring, pseudopodia as long as the anthe- 

 ridia, of which there are three in the saccate base of each 

 altered leaf. 



11. Jtmgermania harhata, Schreb. Hook. Brit. Jung., tab. 70. Among 



rocks in the demesne, April, 1895. 



12. '^"Jungertnatiiaattenuata, JjindenbeTg. J. harhata, jB mi^ior. Hook. 



Brit. Jung., t. 70, figs. 18-22. Carr. and Pearson's Exic, JSTo. 

 74. J. gracilis, Schleich, Lindb., in Mus. Scand. p. 7. Amongst 

 rocks growing with Leiicohryum glaucum, Hampe, and with 



