XIV 



LIST OF ILLUSTRATIONS 



Page 



Cerebral Hemispheres of Man 22 



Complex Neuron from Cortex of Human 



Brain (after Stohr) - - - .23 



Tactile Organs (after Korotneff and Vej- 



dovsky) 25 



Tactile Organs of Insects (after Von Rath 



and Jobert) 26 



Organs of Touch of Frog and Duck (after 



Merkel and Carriere) 26 



Touch-Corpuscle from Finger Tip of Man 27 

 A Pacinian Corpuscle 27 



A Deep-Sea Fish (Eretmophorus) (after 



Giglioli) 28 



Taste-Organs of a Wasp (after Will) - - 29 

 Taste-Bud from the Tongue of a Rabbit 



(after Engelmann) 29 



Olfactory Organs of Crayfish, Millipede, 



and Wasp (after Leydig and Hauser) - 30 

 Tip of Optic Tentacle of Garden-Snail in 



section 31 



Diagram of a Comb-gilled Snail (after 



Lang) 31 



Olfactory Cells from an Amphibian {Pro- 

 teus) (after Strieker) 32 

 Tentaculocysts of Jelly-Fishes (after 



Haeckel) ... 33 



Central Nervous System of Lob- Worm 

 {Arenicola piscatorum) (after Vogt and 

 Yung) .... 34 



Otocyst of a Heteropod {Pterotrachea) 



(after Claus) 35 



Otocysts of Limpet {Patella) ... 35 

 Otocyst of Lobster {Homarus) 36 



Opossum Shrimp {My sis) (after Ger- 



stsecker) 36 



Chordotonal Organs (after Graber) - - 37 

 Stridulating Organs and Ears of Grasshop- 

 pers (after Landois, Graber, and Fischer) 38 

 Body of an Ascidian Tadpole in section 



(after Kowalevsky) 38 



Diagram of the Membranous Labyrinth of 



a Lower Vertebrate (after Wiedersheim) 39 

 Euglena (partly after Franze) 40 



Rhopalia of a Jelly-Fish (after Hseckel) - 41 

 Eye-Cup of a Star-Fish 41 



Eye-Spot of Nais (after Carriere) - - 42 

 Direction-Eyes of a Leech (Hirudo), a 

 Limpet (Patella), and an Arrow-Worm 

 {Sagitta) (after Whitman, Carriere, and 



O. Hertwig) 42 



Head of Male Honey-Bee {Apis mettifica) 43 

 Mosaic Vision (after Johannes Miiller) - 43 

 Sections through the Compound Eye of an 

 Earwig {Forficula), and the Camera Eyes 

 of a Spider (Epeira diadema), and a 

 Marine Annelid (Alciope) (after Carriere, 

 Grenadier, and Hseckel) - - - 44 



Page 



Diagrammatic Sections through Camera 

 Eyes of Cephalopods (after Lang) - - 45 



Cross Section through the Head of a Tad- 

 pole (from Selenka) - - - - 46 



Pineal Eye of a Tuatara {Hatteria) (after 

 Spencer) 47 



YOUNG ORANG-UTANS {Simia satyrus) - 52 



A Limpet {Patella vulgata) leaving its Scar 

 at Ebb-tide 57 



Nest of the Eider-duck (Somateria mollis- 

 sima) (photo, by R. A. L. van Someren) 60 



Relations between Animals and Plants 

 (partly after Scott-Elliot) ... 65 



The Sunde^ {Drosera) (from Kerner) - 69 



Venus' Fly-Trap (Dioncea muscipula) (from 

 Kerner) ... 70 



PITCHER-PLANTS {Nepenthes destillatoria) 72 



Bladderworts {Utricularia) (from Kerner) 73 



Traps of Bladderwort {Utricularia) (from 

 Kerner) 74 



Liverwort {Frullania dilatata), showing 

 cups in which a Rotifer {Callidina sym- 

 biotica) lives (from Kerner) - - 75 



Cross-section through a Lichen {Collema) 

 (from Kerner) 76 



A Ray- Animalcule (Arachnocorys circum- 

 texta) (after Hseckel) .... 77 



A House-Fly {Musca domestica) killed by 

 Fly-Mould {Empusa muscce) (from Ker- 

 ner) 77 



Bacteria (from Kerner) 78 



Insect-Galls on Leaf of Oak (Quercus) 

 (from Kerner) 79 



Raphides (from Kerner) ... So 



Ant-sheltering Acacia {A. sphcerocephala} 

 (after Schimper) 8 1 



A Saw -Wort {Serratula lycopifolia) de- 

 fended by Ants {Formica exsecta) - - 82 



Diagrammatic Section through a Simple 

 Flower 84 



The Nottingham Catch Fly (Silene nutans) 

 visited by a moth {Dianth&cia albi- 

 macula) (from Kerner) 86 



Cross-pollinated Flowers (from Kerner) - 87 



Pollination of Monkey Musk {Mimulus 

 luteus) (from Kerner) - - - - 90 



A Teasel {Dipsacus laciniatus), showing 

 Water-cups (from Kerner) - - 92 



Snowdrop {Galanthus nivalis) (from Ker- 

 ner) 93 



Flower of Plumbago Europcea (from Ker- 

 ner) .--- - - 93 



Section through Flower of a Honeysuckle 

 (Lonicera alpigena) (from Kerner) - 94 



Fruit of Linnaa borealis (from Kerner) - 97 



Fruits of Goose-grass (Galium aparine) 

 (from Kerner) - - - - - 98 



