CONTENTS XV 



CHAPTER V 



ANIMAL-PLANTS AND SEA-WEEDS 



Sea-weeds have no strong branches to support their weight — 

 Sea-weeds that are not sea-weeds — Animal-plants — The 

 structure of ditto — Fossil species — Mediterranean corals — 

 The polypes — Their resemblance to flowers and seeds — 

 The hard red coral of necklaces, &c. — Polypes the builders 

 and not man — Algae, or sea-weeds proper — Their structure — 

 Algae with hard and stony fronds — Lime-builders 



Pp. 108-131 



CHAPTER VI 



INSECTS' EGGS 



Eggs of insects present fascinating objects for microscopic inves- 

 tigation — Maggots no longer supposed to be spontaneously 

 generated from putrefying substances — Eggs of the common 

 house-fly — Number of eggs deposited varies — Successive 

 generations and production of living young — Aphides or 

 "green-flies" — The hover-flies — The lacewing-fly — The 

 wonderful eggs of birds' parasites — Structure of insects' eggs 

 — Eggs of butterflies and moths — Where found — Instinct of 

 the mother insect — Blunders made by insects in depositing 

 their eggs — Varieties of form— What purpose the artistic and 

 microscopic sculpturings may serve . . . Pp. 132-156 



CHAPTER VII 



ANIMAL PARASITES 



All living animals pestered more or less by parasites adapted to 

 prey upon them — Insects no more exempt than larger ani- 

 mals — Hyper-parasitism — Parasites which require several 



