282 Mr. R. Spruce un the Musci and Hepaticae of Teesdale. 



any one acquainted with these species^ it is needless to enter into 

 an exposition of them. 



I ought to add that Mr. Wilson has favoured me with speci- 

 mens of what I consider to be a state of J. Bantriensis, gathered 

 by Mr. Ralfs near Dolgelley, in September last. It differs from 

 the normal form only in its laxer habit^ more distant and sub- 

 patent leaves. 



5. Jungermannia barhata, Schreb. Frequent, especially near the 

 High Force; usually intermixed with mosses. 



6. — bicuspidata , L. Everywhere. 



7. — bidentata, L. Common ; but not ascending the mountains. 



8. — byssacea. Roth. In several localities. Few Jungermannice 

 are more various in their hues than this little species : in Hell Cleft 

 it gives to the large patches of Barbula tortuosa which it infests the 

 appearance of being strewed with soot ; near Maize beck it imparts 

 a pinkish tinge to Dicranmn glauciim and other palustrous mosses ; 

 growing on the earth near the High Force, its colour is a deep green. 

 In the last-named locality the stems exhibit stipules, which are very 

 minute, ovate and entire towards the base of the stems, but bifid in 

 the upper part. Stipulaceous varieties of /. byssacea are not unfre- 

 quent near York, and might be mistaken for /. Francisci, Hook., 

 which is however a perfectly distinct species. 



9. — ciliaris, L. Very sparingly on Cronkley Fell. This usually 

 alpine species flourishes in abundance on all our moors in the Vale 

 of York, where its constant companion is Cetraria Islandica. 



10. — concinnata, Lightf. On rocks south-east from Cronkley 

 Bridge, and more abundantly at the base of Holwick Scarr. 



11. — cordifolia. Hook. In streams on the west side of Mickle 

 Fell ; on wet rocks near the Tees, in various places. 



12. — Dicksoni, Hook. Cronkley Scarr and rocks south-east of 

 Cronkley Bridge, but very scarce. 



13. — dUatata, L. On trees. 



14. — ecMnata, Tayl. MSS. On limestone rocks in Hell Cleft, 

 Ettersgill beck, and on the Yorkshire side of the High Force. I have 

 seen /. hamatifolia. Hook., its near congener, in precisely similar 

 situations on slate and old-red-sandstone rocks in the south-west of 

 Ireland. 



15. — emarginata, Ehrh. Abundant in moist rocky situations, 

 especially near streams. 



16. — epiphylla, L. Near streams. 



17. — excisa, Dicks. In many places. 



18. — fiircata, Linn. Rocks and trees. 



19. — incisa, Schrad. Near Maize beck. 



20. — inflata, Huds. In heathy places. 



21. — laxifolia, Hook. At the base of the High Force; very 

 scarce. 



22. — Lyellii, Hook. I found a single plant by the Tees near 

 Winch Bridge. 



23. — Lyoni, Tayl. MSS. Cronkley Fell and Holwick Wood. 



