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Fig. 
Fig. 
Fig. 
KUNGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 51. N:o 3. 55 
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Explanation of Plates. 
(All the figures are in natural size if not otherwise stated.) 
Plate 1. 
Nathorstia alata n. sp. 
Ls Impression of the upper side of a frond, with the carbonized remains of the vegetable tissue partly 
preserved and showing synangia. 
2—3. = Portions of sterile pinnae showing the anastomosing venation, '9. 
4—6. = Portions of fertile pinnae with synangia, 1. 
id Two of the synangia in fig. 6, 1. 
8—9. Spores, 240 
Cladophlebis australis (MORR.) SEW. 
SLOTT Pinnae. 
12,13. Pinnules of the specimen in fig. 11, nearly ;. 
Gleichenites San-Martini n. sp. 
14. Fragments of several pinnae: to the right, some still attached to a rachis. 
ID Portion of one of the pinnae in fig. 14, showing impressions of sori, 7. 
Gleichenites cf. mieromerus (HR.). 
2 16: The upper part of a frond or pinna of the first order. 
17, 18. Portions of the specimen in fig. 16, $. 
Sphenopteris (Onychiopsis?) psilotoides (SToKEs & WEBB) WARD? 
HOS The uppermost portion of a frond or pinna of the first order. 
Plate 2. 
Sphenopteris patagonica n. sp. 
[TE Two pieces of the plant-bearing rock covered with portions of branching rachises and segments. 
3. Portion of a frond showing the pinnate dissection of the ultimate segments. 
