280 



INDEX 



Development of Birds (Chick), 247 

 Cephalodiscus, 180 

 Craniata (Vertebrata), 194-214 

 Crustacea, 136 

 Helix (Snail), 166, 172 

 Hydra, 80 

 Mammals, 259 

 Mollusca, 166 

 Polychaeta, 122 

 Porifera (Sponges), 71 

 Rabbit (Lepus), 259 

 Scyllium (Dogfish), 226 

 Trematoda (Flukes), 91 

 Tunicata (Ascidians), 181 



Diaphragm, 250, 258 



Diastema, 251 



Diarrhoea, Cause of endemic, 112 ; 

 disseminator of. 145 



Dichogamy, 12, 181, 18:} 



Difflugia, 29 



Dimorphism, 32, 33 ; Sexual, 156 



Dipnoi (Double breathers), 229 



Diptera (Two-winged Flies), 42, 142-145 



Disease, Agents in the spread of zymotic, 

 145 



Distomum. See Fasciola. 



Distribution, Geographical, 261-275 

 Discontinuous, 137, 229 



Division of labour, Physiological, 17, 84 



Dochmius. See Ancylostoma. 



Dog (Canis), 262, 269 



See Scyllium. 

 , 181, 182, 185 



Dracontiasis or Guinea-worm disease, 111 



Dracunculus, syn. Filaria, 111 



Duckmole. See Orniihorhynchux. 



Dum-dum fever, Cause of, 45, 146 



Dysentery, Cause of tropical, 28; dis- 

 uinator of, 145 



KAIL. Scf. Otocyst. 

 Earthworm. See LnuiJ>rirn*. 

 Ecdysis or moulting, 126 

 Echidna (Spiny Ant-eater), 261, :>66 

 Echinococcus, KM) 



Multilorular, 101 



Eohinodermata, K>:5 ; Classes of. Kit 

 I'ji-liiiuiK (Sea-urchin), Kit 

 Ectoderm, 15. 78; syncytial, 102, 104 

 ]<>!,, parasite, 53, 112, ll'l, 121, 128, 145, 

 146. I">1 



Ectoplacenta, 260 



Ectoplasm, 19, 21, 27 



" Edentata," 261 



Eel (Anguilla), 228; Electric eel (di/nt- 

 notus), 228 



Eel-worms (Anguillulidae) and disease, 

 111 



Effodientia, 261 



Egg. See Ovum and Ova. 



Elasmobranchii, 219, 227 



Electric organs, 218, 227, 228 



Elephas (Elephant), 263 ; elephants, 2i!i : 

 Indian and African compared, 270 



Embryo, 80, 98 (hexacanth), 190 



Encystation, 22, 24, 28, 30, 31, 37, 53 



Endoderm, 15, 77, 78 



Endodermal tubes and >nl 



Endolymphatic duct, 206 



Endoplasm, 19, 27 



Endoskeleton, 177. 196 



Endostyle, 183, 186, 193, 215 



Endothelium, 204, 209 



Entamoeha, 28 



Enteric fever. Carrier of, 145 



Enteron (Gut), 191 



Enteropneusta or Hemichorda, 177 



Entozoic, 48 



Epiblast. See Ectoderm. 



Epiboly, 15, 1 90 



Epididymis, 258 



Epipharyngeal groove, 186 



Epiphyses, 250 



K|i|)hysis. AV* Pineal body. 



A' tit/lr IHI,, 37 



" Kiiij-lenoid " movement, :>7. H. .">."> 



Kustiichian tubes, 207 



Kutheria, 261, 2(57 



Kxeretory pystem of Amphio.r.iiN, ISO 

 Am>fl)if(i (1'Vesli 



Mussel), 173 

 Astacua (Crayfish), i:5:> 

 ('oliiiiibn (Pigeon 

 Craniata, 21^ 

 llclir (Snnil). 171 



Ilinufa (Leeoh), 124 

 Insects, 138 

 Lepus (lla,bbit), 25S 

 IsH-iH.hricu* (Earthworm), 



IKi 



,, N m at o (1 a (K o 11 n d 



Worms). 102 



