ILLUSTRATIONS xiii 



FACING PA&E 



The Paradox Frog and its Tadpole .... 190 



Stages in the Development of the Dog-fish, and of 



Gymnarchus ........ 208 



Eggs of Fishes ........ 212 



Bow-fin and Nest — Butterfish and Eggs . . . 216 

 Young Bitterling lying in the Gills of a Mussel — 



Young Skate in Oviduct ..... 222 



Young Stalk-eye and Young Ribbon-fish . . . 224 



Young Fish sheltering under Jelly-fish . . . 224 



Young Angler-fish ....... 226 



Young Sword-fish ....... 226 



Young and Adult Snake-fish, and Young and Adult 



Grey Gurnard ....... 228 



Early Stages in the Life-history of the Plaice . . 230 



Transformations of the Eel ..... 232 



Young Crabs 236 



Cast-off Shells of a Crab ...... 238 



Larva of Spiny Lobster — Larva of Barnacle — Larva of 



Sergestes — Larva of Prawn ..... 240 



Stages in the Life-history of the Atlas Moth Cater- 

 pillar — Caterpillar of the Tiger-moth — of the 

 Lobster-moth — of the Feathered Thorn Moth, 

 showing Stick-like Attitude — of Essex Emerald 

 Moth, with Leaves attached to Body — Dwelling- 

 cases of Weaver-moths — of Hammock Moth, made 



of Excrement ....... 242 



Four Stages in the Life-history of the Puss Moth . 244 



Caterpillar Colonies ....... 250 



Incidents in the Life-histories of some Butterflies and 



Moths 252 



The Birth of the Dragon-fly . . . . .258 



