1863.] DAWSON CARBONIFEROUS REPTILES. 469 



Figs. 5. Fragment of root of Conifer. 



6. Portion of pinna of Cyclopteris Brownii ; (6 a) stipe of C. Jacksoni. 

 7 & 8. Sphenopteris recurva. 

 9. Cordaites flexuosus. 



10. Pinna of a Fern, not named ; (10 a) portion magnified. 



11. Carpolithes lunatics. 



12 & 13. Trichomanites filicula. 



14. Lycopodites comosus ; (14 a) portion magnified. 



15. Carpolithes spicatus. 



16. Fern, not named. 



17. Pinna of Cyclopteris Bogersi. 



18. Stipe of Cyclopteris Bogersi. 



Plate XVIII. 

 Fig. 19. Leptophlceum rhombicum, restored; (19 a) leaf. 



20. Fragment of bark of Conifer. 



21. Anartkrocanna Perry ana. 



22. Rhizoma of Psilophyton princeps ; (22 a) cross section of the same, 



showing the axis and bark ; (22 b) portion of cross section magni- 

 fied, showing remains of the bark /3, of inner bark e, of the woody 

 sheath of the axis y, of the scalariform centre of the axis S ; (22 c) 

 cross section of the tissue of the axis, magnified 100 diameters ; 

 (22 d) longitudinal section of the tissue of the axis ; (22 e) cross 

 section of the outer bark ; (22 /) longitudinal section of the axis of 

 the aerial stem for comparison with e; (22 g) cross section of the 

 axis of another specimen, magnified as in c. 



23. Portion of the stem of Nematoxylon tenue ; (23 a) cross section slightly 



enlarged ; (23 b) longitudinal section ; (23 c) transverse section, 

 magnified 200 diameters. 



Plate XIX. 



Fig. 24. Longitudinal section of the stem of Nematoxylon crassum, magnified 

 100 diameters ; (24 a) cross section ; (24 b) transverse section of 

 a few cells, magnified 200 diameters. 



25. Stem with tubercles ; (25 a) magnified. 



26. Pinna of Cyclopteris Jacksoni ; (26 a) separate pinnule ; (26 b) dia- 



gram of venation ; (26 c) small variety. 



27. Pinna of Cyclopteris Bogersi ; (27 a) separate pinnule ; (27 b) dia- 



gram of venation. 



28. Pinna of Cyclopteris Halliana ; (28 a) separate pinnule ; (28 b) dia- 



gram of venation. 



29. Lycopodites. 



30. Stem with ridges. 



31 . Stigmaria ? ; (31 a) areole magnified. 



32. Fucoides (Chondrites) Cauda-galli (reduced), 



33. Fucoides (Zonarites) velum, (reduced). 



2. Notice of a New Species of Dendrerpeton, and of the Dermal 

 Coverings of certain Carboniferous Reptiles. By J. W. Dawson, 

 LL.D., F.R.S., F.G.S., Principal of M'Gill University, Montreal. 



The following notes relate to new facts ascertained in the course of 

 a re-examination of Ithe remains of Reptiles from the Coal-formation 

 of Nova Scotia, made in the preparation of a resume of the cha- 

 racters of these creatures, which is in course of publication. I 

 desire now to communicate these facts to the Geological Society, as 

 they are connected with, and supplementary to, the descriptions 

 published at various times in its Journal. 



