HANDBOOK OF SHELLS. 



57 



CLASS II. GASTEROPODA. 

 ORDER I. Prosobranchiata. 



Division a, Siphonostomata. 



No. of 



Family. Genus. Species. 

 i. Strombus 60 



Pteroceras 12 

 8. Murex 180 



Columbella 200 

 Mitra 350 



Fusus 



3. Buccinum 

 Eburna 

 Nassa 

 Purpura 

 Harpa 

 Oliva 



4. Cassis 

 Dolium 



100 



9 



210 



140 



9 

 117 



34 

 15 



Triton 



100 



Ranella 50 



Pyrula 40 



5. Conus 300 

 Pleurotoma 500 



6. Voluta 100 

 Cymba 10 

 Marginella 90 



7. Cypraea 150 

 Ovulum 36 



Natica 



90 



Sigaretus 26 



9. Cancellaria 70 



10. Pyramidella 1 1 



Odostomia 35 



Chemnitzia 70 



Eulima 26 



IT. Solarium 25 



12. Scalaria 100 



13. Cerithium 100 

 Potamides 41 

 Aporrhais 3 



Distribution. 

 W. Indies, Mediterranean, Red Sea, Indian Ocean, 



Pacific low water to 10 fathoms. 

 India, China. 

 On all coasts. 



Sub-tropical regions, in shallow water on stones. 

 Tropical regions, from low water to 80 fathoms. 

 On all coasts. 



Northern seas, from low water to 140 fathoms. 

 Red Sea, India, Australia, China, Cape of Good Hope. 

 World-widelow water to 50 fathoms. 

 World-wide low water to 25 fathoms. 

 Tropical deep water, sand, muddy bottoms. 

 Sub-tropical low water to 25 fathoms. 

 Tropical regions, in shallo\y water. 

 Mediterranean, India, China, W. Indies, Brazil, New 



Guinea, Pacific. 

 Temperate and sub-tropical regions, from low water to 



50 fathoms. 



Tropical regions, on rocks and coral-reefs. 

 Sub-tropical regions, in 17 to 35 fathoms. 

 Equatorial seas shallow water to 50 fathoms. 

 Almost world-wide low water to 100 fathoms. 

 On tropical coasts, from the shore to 100 fathoms. 

 West Coast of Africa, Lisbon, Straits of Gibraltar, 

 Mostly tropical. 



Warmer seas of the globe, on rocks and coral-reefs. 

 Britain, Mediterranean, W. Indies, China, W. America. 



Division b. Holostomata. 



Arctic to tropical regions, on sandy and gravelly bot- 

 toms, from low water to 90 feet. 



E. and W. Indies, China, Peru. 



W. Indies, China, S. America, E. Archipelago low 

 water to 40 fathoms. 



W. Indies, Mauritius, Australia, in sandy bays and 

 on shallow mud-banks. 



Britain, Mediterranean, and Madeira low water to 

 50 fathoms. 



World-widelow water to 100 fathoms. 



Cuba, Norway, Britain, India, Mediterranean, Aus- 

 tralia 5 to 90 fathoms 



Sub-tropical and tropical widely distributed. 



World-wide low water to 100 fathoms. 



World-wide. 



Africa and India, in mud of large rivers. 



Labrador, Norway, Britain, Mediterranean 20 to 100 

 fathoms. 



