Plate VII. 



Page 



Fig. 1. Lingula sp 18 



Fig. 23. Stropheodonta patersoni HALL vur. antiqua nov. var 19 



F'ig. 2. A ventral valve, relatively large and flat. 



Fig. 3. Outer cast of a dorsal valve. 



Fig 4. Strophonella cf. euglypha His., a fragmentary ventral valve .... 20 

 Fig. 5. Gypidula coeymanensis SCHUCHERT, var. prognostica SCHUCHERT . .21 



Fig. 6. Schuchertella interstriata HALL, var. sinuata nov. var 20 



Fig. 78. Stenochisma deckerensis WELLER, var. arctica nov. var. (from B, 



upper part) 21 



Fig. 7. A relatively globose specimen. 



Fig. 8. A flatter one. 

 Fig. 9 12. Lissatrypa scheii nov. sp. (from Reindeer Valley) 24 



Fig. 9, 11. A small specimen. 



Fig. 10. A small specimen with the dorsal valve removed, showing 

 the spiral cones. 



Fig. 12. A very large specimen. 

 Fig. 13. Lissatrypa phoca SALTEH, a specimen of moderate size, from Beechey 



Isl. (Exp. of the "Gj6a") 25 



