Plate VII. 



Page 



Lingula sp. . . . . 18 



Stropheodonta patersoni Hall vur. aittiqua nov. vur. 19 



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



Fig. 3. Outer cast of a dorsal valve. 



StropliDnella cf. eugli/pha His., a fragmentary ventral valve . . 20 



Gypichila coeymanensis ScuucHERr, var. progiiostica Schuchert . . 21 



Schuchertella interstriata Hall, var. sinnata nov. var 20 



Stenochisnia cleckerensis Weller, vur. arctica nov. var. (from B, 



upper part) . . . .... .21 



Fig. 7, A relatively globose specimen. 

 Fig. M. A flatter one. 

 Fig. 9— 12. Z/tssa(»7/pa 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 Salter, a specimen of moderate size, from Beechey 



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



