LIST OF PLATES. 
vii 
PLATE VIII. 
AQUATIC PLANTS, ETC. 
No. 
1. The Arrowhead .... 
. Saggitaria sagittifolia . 
PACK 
. 32 
2. The Yellow Water Iris . 
. Iris Pseudacorus . . 
. 24 
3. The Water Soldier . . . 
. Stratiotis aloides . 
. 31 
4. The Water Spider . . . 
. Argyroneta agmtica . . 
. 105 
5. The Crayfish. . * . . 
. Astacus fluviatilis 
. 106 
6. The Tree Frog .... 
. Rana arborea .... 
. 97 
