34:4 Proceedings of the Royal Irtah Academy. 
3. P. alternifolium (Bruch et Schimp.). Bryol. Enrop. Yol. i. tab. 
10, Coroll, p. 6, Pliascum alternifolium, Bryol. Brit., p. 35, tab. 37. 
Muscol. Brit., ed. 2, p. 5, tab. 5. 
Hab. Banks and fallow ground, near Bantry, Miss Hutchins ; Dun- 
kerron, Taylor in Tlor. Hib. 
Sub-tribe 1 1 . DiCRAifoiDEiE. Cap side opeiiing, lid deciduous. 
4. BEiCHYODUs. Nees et Hornsch. 
Plants small ; stems gregarious and slender. Leaves subulate setaceous. 
Peristome single of 1 6 short truncate teeth, pale and fugacious, 
scarcely reaching above the broad annulus. Inflorescence 
monoicous. 
1. B. tricliodes (]N"ees et Hornsch). Bryol. Germ. tab. 25. Weissia 
trichodes, Muscol. Brit., Ed. 2, p. 83, tab. 15. Grimmia tri- 
chodes, Engl. Bot., tab. 2563. 
Hab. On rocks of granite and sandstone. ITear Lough Bray ; 
Taylor in Elor. Hib. Kelly's Glen, Dublin, on the shady 
side of granite rocks near the stream, in fruit, May, 1863. 
This species is rare in Ireland, and hitherto only known in the 
granite districts of Wicklow and Dublin. 
5. Seligeria. Bruch et Schimp. 
Plants small, almost stemless. Leaves lanceolate subulate ; areolation 
dense, the basal cells larger. Peristome single, of 16 obtuse 
teeth, without a medial line ; operculum large obliquely rostrate. 
Inflorescence dioicous. 
Diagnosis of Species. 
Pedicel straight ; lid of capsule obliquely 
rostrate, 1 . S. pusilla. 
Pedicel recurved ; lid of capsule straight, . 2. S. eecuevata. 
1. S. pusilla (By. et Sch.). Bryol. Europ., vol. n. tab. l^o. 110, Bryol. 
Brit., tab. 15. "Weissia pusilla (Hedw.) Muscol. Brit. Ed. 2, 
p. 86, tab. 15. 
Hab. Sides of shady calcareous rocks. !N'ear Belfast, at Wolf hill, 
above the mill, in considerable abundance on the white lime- 
stone rocks ; fruiting, May, 1 837. Also on shady limestone rocks 
above Lisburn, Antrim. This rare and pretty little Moss 
appears to be confined in Ireland to the white limestone rocks 
of Antrim. 
