es 
So ON 
i 
8. 
9 
10. 
JW 
12. 
13, 
14, 
i5, 
6, a portion of the matrix, 
with impression of the ex- 
terior surface. 
. Mitra ebenus, nat. size 
Mitra plicifera 
. Cancellaria scalaroides 
Rissoa soluta 
Odostomia unidentata 
Rissoa Thermalis 7 
6, apex enlarged. 
a, 6. Lacuna vincta . 
a, 6. Jeffreysia? patula 
a, 6. Helix ruderata . 
APPENDIX. 
Page 
. Trophon Norvegicum 312 
. Trophon Turtoni 312 
. Trophon propinquum ? 313 
6, apex enlarged. 
. Trophon Fabricii 313 
. Nassa pygmea 315 
. Pyrula acclinis 311 
310 
311 
316 
318 
317 
319 
316 
319 
309 
TAB. XXXI. 
Fig. Page 
16. Odostomia truncatula : 318 
17, a, 6. Helix incarnata 309 
18, a, 6. Paludina marginata 320 
19, a, 6. Helix fruticum . 308 
20. Pecten polymorphus 323 
21. Mactra triangulata . 324 
d, hinge of right valve enlarged. 
a, exterior slightly enlarged to 
show regularity of ridges. 
22. Helix arbustorum 306 
23. Pholadidea ‘ - 825 
24. Aplysia? asciola S o22 
a, 6, 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. 
6, outside view of right valve. 
Note. The lines denote the size of specimens. 
