Vi. CONTENTS. 
LIST OF PLATES. ° 
Portrait of Hugh Cuming (frontispiece) 
Lifu Mollusca 
Variation of Purpura lapillus 
Irish Kitchen Middens 
Trinidad Mollusca 
Lifu Mollusca 
ILLUSTRATIONS IN THE TEXT. 
Map of the Loyalty Islands 
Stilifer turtont 
Planorbis carinatus m. scalar tforme 
Adeorbis unisulcatus, Chaster 
Olivella williamst, Melvill and Standen 
Diagrammatic figures of primitive Planorbis 
Atavic sinistral monstrosity of Planorbzs spiroi bis Mill. 
Atavic dextral monstrosity of Planordes sptrorbis Miill. 
