LIST or ILLUSTEATIONS. 



PAGE 



gnette on Title-page, Nautilus simillimus, F. and C. ; Lias, Chaimouth i 



G. 1. — Univalve shell of iS'ca/arta j3r(?^t<3«a, Lamk. ; Eeceut, China ... 1 



2. — ,, ,, Ampullaria canaliculata, Lamk. ; Eecent, 



S. America 1 



3. — Bivalve shell of Glossus (Isocardia) cor, Linn. ; Recent, British 2 



4. — Miiltivalve shell of Chiton squamosus, Linn. ; ,, ,, 2 



5. — Helix desertorum, Forsk., the desert-snail, with its animal ; Egypt 2 



6. — TAraa« jsiAastfo^iwa, Lamk., with its animal; British 3 



7. — Nervous system of Taludina or Viviparus, the pond-snail ... 3 



8. — Nerve -ganglia and cords of Anodonta, the river -mussel ... ... 3 



9. — Part of the radula of Testacella haliotoidea (drawn by S. P. 



Woodward) 4 



10. — Part of the radula of Auricula, sp. (drawn by S. P. Woodward) 4 



11. — ,, ,, ,, Siphonaria, sp. ,, ,, ,, 4 



12. — Common fresh- water mussel, C'wtojsiC^rMm, Linn. (2 figures) ... 5 



13. — ^View of under-side of foot of Zimnaa stagnalis, Linn. ... ... 5 



14. — A Pteropod, Cleodora pyramidata, Linn. ... 



15. — Sepiola Hondeletii, Gesuer ; Recent, Torbay 



16. — Sepia officinalis, lAwa.. 7 



17. — Animal of Octopus vulgaris, Lamk. ; Channel Islands 7 



18. — Shell of the Pearly Nautilus, Nautilus pompilius, Linn. 



Indian Ocean 

 19. — Animal of the Pearly Nautilus in its shell (the shell is cut 



open) 



20. — Mouth, feet, and foot-tentacles of Loligo vulgaris, Lamk. 



21. — Suckers of tentacles of Octopus (enlarged)... 



22. — Beak, or mandible, of Arehiteuthis monachus, Steen. (one-third 

 nat. size) 



23. — Part of the radula of /S^jom q^<;ma/i«, Linn, (magnified) 10 



24. — ,, ,, ,, Octopus vulgaris, Lamk. ,, 10 



25. — Internal shell and animal of the squid, Loligo media, Linn. 



British 10 



26. — Internal shell or sepiostaire of the cuttle, Sepia officinalis, Linn. 



British , 10 



