208 



Astarte Bayi, Lundgren. 

 Fig. 13. Right valve enlarged Vi- Block of dark-coloured calcareous 

 sandstone from Vardekloft. 



Astarte sp. cf. elegans, Sowekby. 



Fig. 14. Both valves of the same specimen: a) view of exterior of right 

 valve, b) view of reverse side of same valve showing internal cast of left 

 valve with the border of right valve, c) the same valve (with the cast) from 

 anterior end, d) interior of left valve. Brown sandstone of Mount Nathorst. 



Fig. 15. Fragment of a right valve to show the sculpture of the surface. 

 Brown sandstone of Mount Nathorst. 



Astarte sp. cf. Sæmanni, de Loriol. 

 Fig. 16. Fragment of a right valve: a) from the side, b) from the front. 

 From a loose block of light-coloured sandstone, found in Aucella River in 

 the south-Avest of Jameson's Land. 



? Pleuromya sp. 

 Fig. 17. A cast partly covered with shell-substance: a) from the side, 

 b) from above. From a loose block of light-coloured sandstone, found in 

 Aucella River in the south-west of Jameson's Land. 



Tancredia sp. cf. angulata, Lycett. 

 Fig. 18. A cast in brown sandstone from Mount Nathorst. 



Tancredia sp. 

 Fig. 19. A cast in a loose block of light-coloured sandstone, found in 

 Aucella River in the south-west of Jameson's Land. 



Pholadomya angustata Sowerbt sp. 

 Fig. 20. A cast: a) seen from the side, b) from the front. Brown sand- 

 stone of Mount Nathorst. 



Plate VIL 



Ostrea eduliformis, Schlotheim. 

 Fig. 1. Left valve, interior. 

 Fig. 2. Right valve, interior. 

 Fig. 3. Left valve : a) interior, b) exterior, c) posterior view. 



Ostrea sp. cf. eduliformis, Schlotheim. 

 Fig. 4. Left valve : a) interior, b) posterior view. 



Fig. .5. A small specimen with both valves : a) seen from the right side, 

 b) seen from the left, c) anterior view. 



All these specimens were obtained from the ^ oyster-bank n on Mount 

 Nathorst. 



