DESCRIPTION OF PLATE IV. 

 Illustrating Prof. Gregory's Paper on the Glenshira Sand. 



Fig. 



1. — Eunotia FaJx, n. sp. 



(Found in the deposits of LUneberg and Lillhaggsjcin. See Vol. II., 

 p. 104, of this Journal.) 



2. — Nitzschia Sigmatella, n. sp. 



(Found as above, but also in the Mull deposit, and, with all the 

 following figures, in the Glenshira sand.) 



3, — Cymhella truncata, n. sp. 



4. — Amphora Arcus, n. sp. 



5. — „ incurva, n. sp. 



(j. — „ angularis, n. sp. 



7. — Oocconeis transversalis, n. sp. 



8. — „ speciosa, n. sp. 



9. — „ distans, n. sp, 

 10. — „ costafa, n. sp. 

 11. — Eupodiscus Balfsii? var. 

 12. — Surirella fastuosa, var. 

 13. — Tryhlimiella constricta, n. sp. 

 14. — Amphiproa Vitrea, var. ? 

 15. — Navicula hirostrata, n. sp. 

 16. — „ rhomhica, n, sp. 

 17. — „ gastroides, n. sp. 

 18. — „ crassa, n. sp, 

 19. — „ maxima, n. sp. 

 20. — Pinnularia Oastrum, Ehr. 

 21. — „ apiculata. n. sp. 



22. — Synedra Vertebra, n. sp. 

 23. — „ imdidans, n. sp. 



