CONTENTS. Vii 
LETTER VIII. 
Page 
‘Description of the Helix, or common Snail, with that of 
different species; their use in various countries, - 156 
LETTER IX. 
Reflections at Weymouth—Limpets—General harmony 
of Nature. “ - = - = = = - 75 
LETTER X. 
Construction of the Ship-worm—Depredations on the 
dikes in Holland— Specimen from Sheppy — Appa- 
rently injurious; actually beneficial.—Similar in their 
operations to Termites— Reflections arising from the 
subject. - - - - - = = = - 178 
LETTER XI. 
Fossil Shells — Important deductions arising from them 
—Cuvier’s opinion—Closing observations of Professor 
Jamieson = = 2 = = - = - 190 
LETTER XII. 
Sand-shells— Remarks by the sea side—Address to the 
ocean 2 a 4 5 4 sa ts = = 20) 
