Explanation of Plates. 



Pl. I. 



Figs. 1, la, 2, 3, 3a, Scaphaspis Nathorsti n. sp. From Dickson bay, Bottenfjellet. Fig. la enlarged. 

 » 4, 4a. Ceplialaspis sp. 



Pl. II. 



Figs. b. Cephalaspis sp. 



» 6. Lophostracon Spitzbergense n. gen. et spec. 



i> 7 — 9. Scales of Rhizodont fishes from Mimers valley. Fig. 7 enlarged 2V2 diam., fig. 9 enlarged 

 2 diam. 



Pl. 111. 



Figs. 10 — 12. Scales of Rhizodont fishes from Mimers valley. Fig. 10 enlarged 3 diam., figs 1 1 — 12 enlarged 

 4 diam. 



Pl. IV. 



Figs. 13 — 15. Teeth of fishes from Mimers valley. 

 B 16 — 17. Bony fragments, probably of a Rhizodont fisli 

 » 18. As figs. 13 — 15. 



