h t j Hk> 



Fig. 2. THE " CARAWAY-WORM," 

 THE LARVA OF A BUTTERFLY 



Fig. 3. A CRAY-FISH 



Fig. 5. A SOW-BUG (Cylisticus con- 

 vexus) (after Sars) 



Fig. 4. CRUSTACEA 

 a, Cypridopsis b, Cyclops c, Daphnia 





Fig. 6. A MILLIPEDE 

 5 



