Plate VII. 



Fig. 1. Limjnld sp .18 



Fig. 2 ?{. Sti'uphei>ilnnhi patersoni HAI.I. var. antii/mi no\. var 19 



Fig. 2. A venlrul valve, relatively large ami Mai. 



Fig. ;5. Unter cast of a dorsal valve. 



Fig 4. Str(ii>lniH"lltt cf. cuuti/plia His., a IVagiiieiilary ventral valve .... 20 



Fig. f>. <:iil>i>li<! fin'iptutnensis Sr.iii'ciiKnr, var. pi-<>u>i<ixlirit SCHI c.in.Hr . . 21 



Fig. (>. Scliucliertella interstridtd HAI.I. . var. simxitti imv. var ^0 



Fig. 7 8. Stenorltisiuii iliTki-n-nsis WU.I.KR, var. nrcticn n>v. var. (froiu B, 



upper part) -I 



Fig. 7. A relatively globose specimen. 



Fig.*. A flatter one. 

 Fig. '.I 1-J. LixHutriipn scheii nov. sp. (Iroin Heimk-er Valley) .... ... 24- 



I 4 'ig. '.I. II. A small specimen. 



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

 the spiral cones. 



Fig. 12. A very large specimen. 

 Fig. !>. Ltsxuti jlfxi i>ltoca SALTKU, a specimen of moderate si/.e, from Beechey 



l.-l. ll'ixp. of Hie "Gjoa") 25 



