LIST OF ILLUSTRATIONS 



HALF-VOL. VII 



COLOURED PLATES 



BEAVERS (Castor fiber) CONSTRUCTING DAM. 



From a Drawing by Wilhelm Kiihnert Frontispiece 



WHITE STORKS (Ciconia alba) ASSEMBLING FOR MIGRATION. 



From a Drawing by Wilhelm Kiihnert 



PRAIRIE DOGS (Cynomys Ludovicianus). 



From a Drawing by Friedrich Specht . . . 



LLAMAS (Lama lama) CARRYING GOODS IN THE ANDES. 



From a Drawing by Friedrich Specht 



62 



134 



232 



BLACK-AND-WHITE ILLUSTRATIONS 



N.B. Figs. 1123, 1124, 1125, 1129, 1130, and 1131 are from Alcock's A Naturalist in Indian Seas, 

 by the courtesy of Mr. John Murray. 



Page 

 Proteus Animalcules (Amoeba} showing 



effect of stimuli (after Verworn) 4 



A Typical Neuron (after Stohr) - - 6 

 Neurons of Jelly-Fishes and Sea- Anemone 



(after R. and O. Hertwig) 7 



Central Nervous System of Earth- Worm 



(after Leuckart) 8 



Structure of Nerve-Cord of Earth-Worm 



(after Retzius) 9 



Diagram of a Simple Reflex Action - - 9 

 Central Nervous Systems of Annelids (after 



Quatrefages) 10 



Structure of a Nemertine Worm - - 1 1 

 Central Nervous System of Apus (after 



Lankester and Pelseneer) - - 12 



Central Nervous System of Crayfish (after 



Vogt and Yung) 13 



Central Nervous System of Crab (after 



Gegenbaur) 14 



Central Nervous System of Peripatus (after 



Balfour) 15 



Page 



Central Nervous System of a Centipede 

 (Lithobius) (after Vogt and Yung) - 15 



Central Nervous Systems of Termite 

 (Termes), Water-Beetle (Dytiscus), and 

 Blow-Fly (Musca) (after Lespes, Gegen- 

 baur, and Blanchard) - - - - 16 



Central Nervous System of Mail-Shell 

 (Chiton) (after B. Haller) ... 17 



Central Nervous System of River-Snail 

 (Pahtdina) (after Von Jhering) - - 17 



Central Nervous Systems of Pond-Snail 

 (Limnceus) and Garden-Snail (Helix) 

 (partly after Lacaze-Duthiers) - - 18 



Central Nervous System of Cuttle-Fish 

 (Sepia) (after Bourne) - - - 18 



Development of Central Nervous System 

 in a Vertebrate 20 



Development of Vertebrate Brain (after 

 Huxley and W T iedersheim) - - 21 



Brains of Trout, Frog, and Dog (after 

 Ecker and Wiedersheim) 21 



