388 Proceedings of the Boijal Irish Academy. 
Capsule ovate-pyriform, widely furrowed, 
the mouth small, and slightly contracted ; 
cilia 8, of one row of cells ; calyptra 
ribbed, very hairy, . . . . 23. O. Bruchii. 
Leaves lanceolate, not much dilated at the 
base, nerved to the apex, bearing a 
tuft of stellate gemmae, . . . 24. 0. phyllanthum. 
1. 0. cupulatum (Kof^m.). Deutsch. Flor., vol. ii., p. 26. Bryol. 
Europ., vol. III. Monogr., p. 8, tab. 209. Bryol. Brit., 
p. 176, tab. 21. Hook, and Grev., in Edinb. Journal of 
Science," vol. i., p. 112. 
Hab. Eocks and walls, chiefly on limestone formations. Frequent 
in the counties of Antrim and Derry. Benbulben, Sligo. .IN^ear 
Galway and Cork. Eruit, April and May. 
2. 0. anomalum (Hedw.). Stirp. Crypt., tab. 37. Bryol. Europ., 
vol. nr. Monogr., p. 10, tab. 210. Schimper, Synop. 
Muscor., p. 262. Wood, in ^' Phytologist," S. S., vol. iv., 
p. 354, December, 1860. 
Hab. On limestone rocks. Very rare in Ireland. A few spe- 
cimens of this moss, with the 16-striated capsules, were 
found by B. Orr on rocks near the Dodder river, at Sally gap. 
The same plant was also collected on limestone rocks near Ar- 
magh by Admiral Jones. Eruit, May . 
3. 0. saxatile (Bridel). Bryol. Univers. 1, p. 275. Wood, in 
''Phytologist," S. S., vol. v., p. 28 (1861). 0. anomalum, 
(Wilson). Engl. Bot. SuppL, tab. 2696. Turner, Muse. Hib., 
p. 94. Muscol. Brit., Ed. 2, p. 126, tab. 21. 
Hab. Bocks and walls, chiefly on calcareous formations. Abundant 
in many parts of Ireland, wherever the limestone rocks crop 
out. Eruit, March to May. 
4. 0. Sturmii (Hornsch. et Hoppe). Crypt. Cent. 2, Decas, 2. 
Bryol, Europ., vol. iii. Monogr., p. 9, tab. 209. Schimp., 
Synops. Muscor., p. 264, ex parte. — Briol. Italiana, p. 30 0. 
Rabenhor., Bryothec. Europ., INo. 884. 
Hab. On rocks by the side of the lake at Luggielaw, Wicklow, 
1857. Eairhead, Antrim, 1863. 
5. 0. tenellum (Bruch). Bryol. Europ., vol. m. Monogr., p. 15, 
tab. 212. Schimp., Synops. Muscor., p. 265. Bryol. Brit., p. 
178, tab. 45. Briol. Ital., p. 311. Rabenhor., Bryothec. 
Europ., Is^o. 1078. 
