282 Mr. R. Spruce on the Musci and Hepaticie 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, Sohreb. 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 Dicranum glaucum 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 J. 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. — dilatata, L. On trees. 



14. — echinata, 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. — furcata, 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. 



