HALLE, ON THE SPORANGIA OF SOME MESOZOIC FERNS. 27 



Explanation of Plates. 



(The figures are in natural size, except where otherwise stated.) 



PI. 1. 

 Danaeopsis fecnnda n. sp. — Scania: Billesholm. 



Fig. 1. Sterile frond with remains of two pinnae. 

 » 2. Fertile pinna. 



» 3. Upper part of another fertile pinna. 

 » 4. Part of the pinna in fig. 2. «/V 

 » 5 — 6. Parts of the same. ^s^i. 

 »> 7 — 10. Parts of the same, showing sporangia and veins. Fig. 



7: Vi; figs. 8—10: ^Vi- 

 » 11. Spores from the same specimen, ^oo/i. 

 » 12. Part of the specimen in fig 3; sporongia partly 



opened, ^^i- 

 » 13. Part of another specimen, showing only basal contours 



of sporangia. */i. 



PI. 2. 

 Kuffordia Goepperti (Dunk.) Sew. 



Fig. 1. Part of a sterile frond. 



» 2 — 3. Parts of fertile fronds. 



» 4. Fertile pinnule showing scattered sporangia. ^°li. 



» 5 — 7. Sporangia, ^o^i. 



» 8. Spores. ^^°/i. 



Cladotheca nndans (Lindl. & Hutt.) Halle 



Figs. 9—12. Sporangia. Fig. 9: ^^i; figs- 10—11: «/x; fig. 12: «/i- 

 Fig. 10 represents a part of fig. 9 in higher magnification. 



Dlctyophyllnm exile (Brauns) Nath. 

 Pigs. 13—16. Sporangia. »Vi- 



Matonia pectinata K. Br. 

 Fig. 17. Sporangium. ^Vi- 



Dlpteris Walllchil (R. Br.) Moore. 

 Fig. 18. Sporangium. '*/i- 



