KITNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 45. N:Q 7. 15 



Explanation of plates 1—3. 



(All figures in natural size. if not otherwise stated.) 



Figs. 1 — 15. Sagenopteris undulata Nath. 



Figs. 1— 3. Typical leaves, showing variation of pinna?. Fig. 1 a, counterpart of outer, left-side pinna tig. 1. 



» 4 — 6 (7?). Small leaves with winged petioles (S. alata Nath.). 



» 8 — 11. Somewhat larger leaves showing transition to the typical form. 

 Fig. 12. Leaf with only two pinna?. 



» 13. Portion of pinna?, showing venation. f. 



» 14. Leaf showing attachment of pinnas. 



» 15. Two pinna- with unusually shar]) marginal teeth [type-specimen of S. dentata Nathorst (4, pl. 2, 



fig. 5)]. 

 Figs. 16 — 17. Leaves of unknown kind [type-specimens oi S. dentata Nathorst il. pl. 2. figs. ti and 7i|. 



Figs. 18—21. Sagenopteris conf. Mantelli Dunkkr sp. 



Figs. 22—23. Sagenopteris sp. 



Fig. 22. Fragment of leaf. 



» 23. Portion of pinna, showing venation. f. 



Fig. 24. Sagenopteris Nilssoniana Bron. sp. 



Pl. 2. 



Figs. l — 14. Hydropterangium marsilioides nov. gen. et sp. 



Impressions from the slate of Bjuf. 



Two counterparts from Hyllinge. 



Specimen of the grey clay of Bjuf, showing impressions of sporocarps. The capsule to the lett 



attached to a pedicel. 



The same specimen and it s counterpart. ]'. 



Photograph of the impression figs. 5 and ti. 2 -^ 4 . 



Impression of capsule from Bjuf, with pedicel. -^. 

 Fi^s. 10, 11. Interiör casts of eapsules from the grey clay of Bjuf. f. 



Fig. 12. Impression of capsule from Hyllinge, with the wall preserved as carhonaceous Iamina. f. 



Figs. 13, 14. Portions of the same specimen, showing ridges and faint veins. -f. 



Figs. 



1. 2. 



» 



3, 4. 



Fig. 



5. 



Figs. 



6. 7. 



Fig. 



8. 



» 



9. 



