114 



Description of Plate I. 



Obolella rotundata nov. sp. Page 12. 

 Fig. 1 ( < 3). Impression of a dorsal valve with the external sculpture. 

 Holmia shales, Tomten. Krist. Univ. Pal. Museum. Catalogue 

 B. K. No. 98. 



Ventral valve with external sculpture. Holmia shales, Tomten. 

 Krist. Univ. Pal. Mus. Cat. No. 13. XXVII. 1000. 

 Ventral valve. Holmia shales. Tomten. Krist. Univ. Pal. Mus. 

 Cat. No. 13. XXVII. 1000. 



Ventral valve. Holmia shales. Tomten. Krist. Univ. Pal. Mus. 

 Cat. No. 13. XXVII. 999. 



Ventral valve. Holmia shales. Tomten. Krist. Univ. Pal. Mus. 

 Cat. No. 13. XXVII. 971. 



Dorsal valve. Holmia shales. Tomten. Krist. Univ. Pal. Mus. 

 Cat. No. 13. XXVII. 1158. 



Dorsal valve. Holmia shales, Tomten. Krist. Univ. Pal. Mus. 

 Cat. No. 13. XXVII. 206. 



Dorsal valve. Holmia shales. Tomten. Krist. Univ. Pal. Mus. 

 Cat. No. 13. XXVII. 206a. 



Ventral valve. Calcareous sandstone bed, Holmia shales. Tom- 

 ten. Krist. Univ. Pal. Mus. Cat. No. 15. III. 6. 

 Quite young dorsal valve. Calcareous sandstone bed, Holmia 

 shales, Tomten. Krist. Univ. Pal.- Mus. Cat. No. 15. III. 7. 

 Large Dorsal valve. Calcareous sandstone bed, Holmia shales, 

 Tomten. Krist. Univ. Pal. Mus. Cat. No. 15. III. 8. 



