378 Proceedings of the Royal Irish Academy. 
Hab. Clay banks and fields chiefly ; but also on walls. This is 
the most generally distributed of all the thick-nerved species 
in Ireland. I have collected it in Mayo, Sligo, and Galway, 
and in the southern and eastern counties ; but it is not common 
in the north. 
5. T. atrovirens (Taylor), in London Journal of Botany," Jan., 
1846, vol. V. Grimmia atrovirens, Smith, Engl. Bot., tab. 
2015. Didymodon nervosus. Hook, and Tayl., Muscol. Brit., 
Ed. 2, p. 115. Desmatodon nervosus, Bryol. Europ., vol. ii. 
Monogr., p. 6, tab. 132. Eabenhor., Bryothec. Europ., No. 830. 
Bryol. Brit., p. 103, ab. 20. 
Hab. On banks generally near the sea. At Killiney, Dr. Taylor in 
El. Hib. Abundant at Howth. On Bray Head, Wicklow ; 
Youghal, Cork ; E. Sargint. Cork Harbour, Isaac Carroll. 
The teeth of the peristome of this plant do not appear twisted, 
and are much shorter than those of most of the other species. 
6. T. revoluta (Schwaegr.). Suppl. 1, 127, tab. 32. He E'otr. in 
Mem. Acad., Turin, 40, p. 314, id. in Muse. It al., 1, p. 54, tab. 
25. Bryol. Brit., p. 126, tab. 12. Lindberg, Europ. Trichost., 
p. 40. Barbula revoluta, Bryol. Europ., vol ii. Monogr., 
p. 27, tab. 153. Eabenhor., Bryothec. Europ., ^o. 422. 
Hab. On walls. Abundant near Hublin, and I have observed this 
moss in most of the counties in Ireland. Bare near Cork, 
Isaac Carroll. 
7. T. Hornschuehiana (Schultz), 1. c, tab. 33, f. 25. T. Hornschu- 
chiana. He I^otr., Syllab., No. 236, and Muse. Ital. 1, p. 
55, tab. 28. BryoL Brit., p. 127, tab. 43. Berk., Handb. 
Brit. Moss., p. 256. Lindberg, Europ. Trichost., p. 41. Bar- 
bula Hornschuchiana, Schimp., Synops., p. 173. Bryol. Europ., 
vol. n. Monogr., p. 28, tab. 148. Eabenhor., Bryothec. 
Europ., No. 671. 
Hab. Walls and rocks. On the walls of the old castle at Carrick- 
fergus, Antrim. In a quarry near Inchiquin, Cork, Isaac 
Carroll. Yery rare in Ireland. 
8. T. convoluta (Hedw.). Stirp. 1, p. 86. T. convoluta, Schrad., 
Spicil. El. Germ., 1, p. 66. Engl. Bot., tab. 2382. MuscoL 
Brit., Ed. 2, p. 54. Bryol. Brit, p. 127, tab. 12. He Notr., 
Syllab., No. 234. Muse. Ital., 1, 53, tab. 25, Lindberg, E;urop., 
Trichost., p. 40. Barbula convoluta, Eabenhor., Bryothec. 
Europ., No. 229. 
Hab. On walls and on hard ground. This plant is generally 
distributed through many parts of Ireland, especially in the 
eastern and southern counties. The variety ^. Sardoa Wils. 
was found near Luttrelstown, Dublin, by Dr. Taylor. 
