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2. O. anomalum, Hediv. Fr. Spring. 
In similar situations to the preceding ; not unfrequent. 
3. O. pumilum, Schwaegr. Fr. Summer. 
0. affine P> pumilum, Brit. FI. Near the root of a sycamore tree at 
Hell wath, by Rip on — W. Brunton. On an ash tree on Clifton ings, 
York — R. Spruce. 
4. 0. TENELLUM, Bruch. Fr. Summer. 
Ash trees on the York road near the Castle Howard gate. Very 
fine on trees by the Cock near Tadcaster — R. Spruce . On trees 
near Guisborough — W. Mudd. On trees at Sutton-under- Whitstone- 
cliff, near Thirsk — J. G. Balter. 
5. O. Sprucii, Mont. Fr. Summer. 
Frequent on trees and shrubs on the hanks of the Ouse, Wharfe, 
and Cock — R. Spruce. Discovered in 1842. Banks of Codbeck at 
Thirsk and Kilvington, of the Swale below Top cliffe, and of the 
Wiske at Kirby Wiske ; generally in company with Tortula latifolia 
— J. G. Balter. 
6. O. affine, Schrad. Fr. Summer. 
Trunks of trees ; frequent. 
7. O. fastigiatum, Bruch. Fr. Summer. 
By a footpath between Greta bridge and Rokeby, 1810 — JV. Borrer. 
8. O, rupincola, Funclt. Fr. Summer. 
O. rupestre, Schleich. Fallen rocks below the High force, Teesdale — 
R. Spruce. 
9. 0. speciosum, Nees. 
On trees and shrubs near Bolton bridge — S. Gibson. 
10. O. STRAMINEUM, Homsdl. 
Teesdale. Frequent in the neighbourhood of Castle Howard, grow- 
ing chiefly on beech trees — R. Spruce. On an ash tree on the south 
bank of the Swale, near Leckby — J. G. Balter. On an ash tree near 
Blakey bridge, Thirsk — J. H. Davies. 
11. O. pallens, Bruch. 
On a willow in Clifton ings, York ; with O. Sprucii — R. Spruce. 
12. O. rivulare, Turn. Fr. Summer. 
Trees by the banks of the Skell, near Ripon — W. Brunton. Balder- 
dale — R. Spruce. Banks of Codbeck and the Swale — J. G. Balter. 
Banks of the Leven, near Ayton — W. Mudd. 
13. 0. diaphanum, Schrad. Fr. Spring. 
Trees, posts, and rocks ; frequent. 
14. O. striatum, Hedw. Fr. Summer. 
O. lejocarpum , B. and S. Walls and trees; frequent. 
15. O. Lyellii, H. and T. Fr. Summer. 
Laskill, Bilsdale, and woods about Mount St. John, near Thirsk— 
J. G. Balter. Ayton, Cleveland — W. Mudd. Trees near Rievaulx 
— John H. Davies. Forge valley, near Scarborough — A. 0. Blaclt. 
Gordale, near Malham. 
