176 NOTES ON BRITISH MOLLUSCAN DISTRIBUTION. 





5. Somerset South 



Divided from North Somerset by 

 the River Parret from Bridgewater 

 to Ilchester, the line thence curving 

 round to the N. extremity of Dorset- 

 shire. 



6. Somerset North ... — 19 10 29 126 



7. Wiltshire North ... ... — — — — — 



8. Wiltshire South ... _ _ _ _ _ 



North and South Wiltshire are 

 separated by the Kennett and Avon 

 canal. 



9- 

 10, 



II. 



high roads running W. and E. to the 

 borders of Wilts, and Sussex respect- 

 ively, through Stockbridgeand Peters- 

 field. 



12. Hants North ... ... — 18 2 20 25 



13. Sussex West ... ... — 40 17 57 87 



Divided from East Sussex by the 

 high road from Brighton to Cuckfield, 

 thence through Crawley to the Surrey 

 border. 



14. Sussex East ... ... 2 30 3 35 170 



15. Kent East... ... ... i 24 16 41 107 



Divided from W. Kent by the 

 Medway and its tributaries from its 

 mouth nearly up to Staplehurst, 

 thence the line is along the high road 

 through Cranbrooke to the Sussex 

 border near Hawkeshurst. 



16. Kent West 



17. Surrey 



18. Essex South ... 



Divided from North Essex by the 

 high road from Waltham and Epping 

 to Chelmsford, thence along the river 

 Blackwater to its mouth. 



19. Essex North ... ... — 17 12 29 150 



20. Hertfordshire ... ... 3 26 7 36 85 



J.C., iv., April, 1884. 



