APPENDIX. TAB. XXXI. 



Fig. 



1. Trophon Norvegicum 



2. Trophon Turtoni 



3. Trophon propinquum ? 



b, apex enlarged. 



4. Trophon Fabricii 



5. Nassa pygmsea 



6. Pyrula acclinis 



b, a portion of the matrix, 

 with impression of the ex- 

 terior surface. 



7. Mitra ebenus, nat. size 



8. Mitra plicifera 



9. Cancellaria scalaro'ides 



10. Rissoa soluta 



1 1 . Odostomia unidentata 



12. Rissoa Therm alis ? . 



b, apex enlarged. 



13, a, b. Lacuna vincta . 



14, a, b. Jeffreysia? patula 



15, a b. Helix ruderata . 



312 

 312 

 313 



313 

 315 



311 



310 

 311 

 316 

 318 

 317 

 319 



316 

 319 

 309 



Page 



318 

 309 

 320 

 308 

 323 

 324 



16. Odostomia truncatula 



17. a, b. Helix incarnata 



18. a, b. Paludina marginata 



19. a, b. Helix fruticum . 



20. Pecten polymorphus 



21. Mactra triangulata . 



d, hinge of right valve enlarged. 

 a, exterior slightly enlarged to 

 show regularity of ridges. 



22. Helix arbustorum . . 306 



23. Pholadidea . . 325 



24. Aplysia ? asciola . .322 



a, b, outside and inside views. 



25. Pecten maximus . . 323 



var. larvatus. 



outside view of flat valve. 



26. Lutraria rugosa . . 325 



a, inside view of left valve. 



b, outside view of right valve. 



Note. The lines denote the size of specimens. 



