ILLUSTRATIONS. 
PLATE I. LIFE IN THE DEEP SEA. i. Sea- Lily, Pentacrinus 
asteria. z. Sponge, Euplectella aspergilhim. 3. Coral, Lopho- 
helia prolifera. 4. Sea-Urchin, Echinus elegans. 5. Basket-fish, 
Asterophyton linkii. 6. Sea-cucumber, C I ado dactyl a crocea. 7. 
Jelly-fish, Pelagia noctiluca. 8. Pteropod, Clio pyramidata. 
FRONTISPIECE. 
PLATE II. INSECT LIFE. i. Ant-Lion in its pit with whole insect 
shown above. la. Ant-lion flying. 2. Tiger -Beetle, Cicin- 
dela campestris. 3. Bombardier Beetle, Brachinus crepitans. 
4. Burying Beetle, Necrophoms interruptus. 5. Cock-tail Beetle, 
Staphylinus olens. 6. Swallow -tailed Butterfly, Papilio Mac- 
haon tofacep. 135 
ILLUSTRATIONS IN THE TEXT. 
PAGR 
The Thread-slime, Protogenes . . . , . . .16 
The Finger Slime, Protamceba . . . , . .18 
Infusoria, Monas, Noctiluca, Vorticella ..... 20 
Foraminifera, Miliola, Globigerina, etc. ..... 23 
Jelly-body of a Miliolite . ...... 24 
Nummulite, showing the chambers ...... 27 
Sun- Slime, Physematium . , . . . . .29 
The Flint Shells of Radiolariae or Polycistinse .... 30 
A fragment of bath-sponge magnified ..... 34 
A British sponge found at Brighton . . . . .37 
A Sponge-egg and the young sponge swimming ... 38 
Development of a young English sponge . . . . .39 
Section of a bath-sponge, showing the chambers . . .41 
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