8. Natica 90 Arctic to tropical regions, on sandy
and gravelly bottoms, from low water
to 90 feet.
Sigaretus 26 E. and W. Indies, China, Peru.
9. Cancellaria 70 W. Indies, China, S. America, E.
Archipelago--low water to 40 fathoms.
10. Pyramidella 11 W. Indies, Mauritius, Australia, in
sandy bays and on shallow mud-banks.
Odostomia 35 Britain, Mediterranean, and
Madeira--low water to 50 fathoms.
Chemnitzia 70 World-wide--low water to 100 fathoms.
Eulima 26 Cuba, Norway, Britain, India,
Mediterranean, Australia--5
to 90 fathoms.
11. Solarium 25 Sub-tropical and tropical--widely
distributed.
12. Scalaria 100 World-wide--low water to 100 fathoms.
13. Cerithium 100 World-wide.
Potamides 41 Africa and India, in mud of large
rivers.
Aporrhais 3 Labrador, Norway, Britain,
Mediterranean--20 to 100 fathoms.
14. Turritella 50 World-wide--low water to 100 fathoms.
Vermetus 31 Portugal, Mediterranean, Africa,
India.
15. Melania 160 S. Europe, India, Philippines and
Pacific Islands--in rivers.
Melanopsis 20 Spain, Australia, Asia Minor, New
Zealand--in rivers.
16. Paludina 60 Northern Hemispheres, Africa, India,
China, etc.--in lakes and rivers.
Ampullaria 50 S. America, W. Indies, Africa,
India--in lakes and rivers.
17. Litorina 40 On all shores.
Rissoa 70 World-wide--in shallow water on
sea-weed to 100 fathoms.
18. Calyptrea 50 World-wide--adherent to rocks, etc.
Crepidula 40 West Indies, Mediterranean, Cape of
Good Hope, Australia.
Pileopsis 7 Britain, Norway, Mediterranean, E.
and W. Indies, Australia.
Hipponyx 70 W. Indies, Galapagos, Philippines,
Australia.
Phorus 9 W. Indies, India, Javan and Chinese
Seas--in deep water.
19. Turbo 60 On the shores of Tropical seas.
Phasinella 30 Australia, Pacific, W. Indies,
Mediterranean.
Imperator 20 S. Africa, India, etc.
Trochus 150 World-wide--from low water to 100
fathoms.
Rotella 18 India, Philippines, China, New
Zealand.
Stomatella 20 Cape, India, Australia, etc.
20. Haliotis 75 Britain, Canaries, India, Australia,
California--on rocks at low water.
Stomatia 12 Java, Philippines, Pacific, etc.--
under stones at low water.
21. Ianthina 6 Gregarious in the open seas of the
Atlantic and Pacific.
22. Fissurella 120 World-wide--on rocks from low water
to 5 fathoms.
Emarginula 26 Britain, Norway, Philippines,
Australia--from low water to
90 fathoms.
23. Nerita 116 On the shores of all warm seas.
Neritina 110 In fresh waters of all warm countries,
and in Britain.
Navicella 24 India, Mauritius, Moluccas, Australia,
Pacific--in fresh water, attached
to stones.
24. Patella 100 On all coasts--adhering to stones and
rocks.
25. Dentalium 30 World-wide--buried in mud.
26. Chiton 200 World-wide--low water to 100 fathoms.
ORDER II.--Pulmonifera.