i 
a 
Oy PY Yo 
. An Insect-net 
. A Duckweed 
. Other Pondweeds 
. The Hydra [2] 
. Water-fleas and Cyclops 
. Caddis-fly Cases [2]... 
. The Larva of Dragon-fy... 
. Larva of Dyticus.......... . 
. Larva of Whirligig Beetle 
. Larva of a May-fly 
. Side View of Crayfish [5] 
. A Campanularian Hydroid Colony [6] 
. A Sertularian Colony [6] 
. A Net for Collecting at the Seaside 
. Sea-anemones 
. A Starfish [6] 
. A Sea-urchin 
. A Shrimp 
. Tumbler with Chloroform 
. A Cockroach [x] 
. Mourning-cloak Butterfly 
. A Wasp’s Nest [3] 
. Cocoon of Cecropia 
. Eggs of Frog Just Laid [2] 
. Eggs of Frog a Few Hours After Laying [2] 
. Apparatus for Removing Oxyyen from Air 
. Heating a Test-tube 
. The Parts of a Locust 
LIST OF ILLUSTRATIONS. 
Nore.— The figures in brackets [1] followiny the titles re- 
Jer to the list, printed below, of books from which the 
illustrations are, by permission, respectively borrowed. 
The House-cricket [1]. 
A Cabbage-butterfly 
Spider and Web 
As Wate resiiall yciccse aetna ieve ce ea Shoe kde aw ew ses He 
Shell of a Fresh-water Mussel [2] 
An American Pondweed 
The Hornwort 
Apparatus for Decomposing Water......... pS shies eh 
