INDEX 



Ctenidium, 61, 69 

 Cystogenous cells, 13 

 Cytophore, 35 



Dactylopodite, 120 

 Dart-sac, 81 

 Darwin, 17, 20 

 Decidua, 307 

 Demibranch, 220 

 Dendrocichtm lactcum^ 2 

 Dental formula, 288 

 Denticles, 208 

 Dentine, 208 

 Deuto-cerebrum, 168 

 Development of Amphioxus, 190 



of frog, 245 

 Dextral shell, 72 

 Diastema, 288 

 Diaphragm, 293 

 Digenetic parasite, 8 

 Digestive gland, 128 

 Distomutn hepaticiim^, 2-16 



volvens, 4 

 Dogfish, 203 

 Dorsal coetom, 182 



pores, 20 



root of spinal nerve, 108, 279 

 Drain-pipe cells, 26 

 Dreissensia po lytnorpha, 67 

 Ductus arteriosus, 296 



Botalli, 275 



Cuvieri, 224, 228, 272 



ejaculatorius, 5, 164 



endolymphaticus, 211, 245 



Ear, see auditory organ 



Earthworm, 17-44 



Ecdysis, 1 08 



Echidna, 292, 307 



Echiuroidect) 45, 49 



Ectoparasite, 8 



Efferent branchial arteries, 225, 273 



Egg cases, 234 



Elytra, 49 



Embryonic knob, 300 



Enamel, 208 



Endite, 96, 108, 122 



Endoderm plate, 140 



Endogastric shell, 88 



Endolymph, 245 



Endoparasite, 8 



Endopodite, 107, 117 



Endoskeleton, 200 



Endostyle, 179 



End-sac, 133 



Enteroccele, 195 



Enteron, 141 



Entomostraca, 92 



Epiblast, 38, 145, 165, 166, 247, 



278, 301 



Epibranchial cartilages, 215 

 Epicranial plates, 151 

 Epididymis, 297 

 Epimeron, 114 

 Epiphyses, 289 

 Epipleur, 176 

 Epipleural fold, 197 

 Epipodite, 120, 122 

 Ethmoturbinal bone, 290 

 Eustachian passages, 266, 279 

 Euethria, 300 

 Euthyneurous, 79 

 Evolution, 283 

 Excretory organs, 3, 64, 73, 103, 



132, 186, 230, 275 

 Exhalant aperture, 56 

 Exile, 96, 109, 122 

 Exogastric shell, 88 

 Exopodite, 107, 117 

 External auditory meatus, 268 

 External gills, 266 

 Extrabranchial cartilages, 222 

 Eye, of snail, 79 



of crayfish, 115 



of Arthropoda, 137 



of Amphioxus, 175 



of frog, 279 



Fallopian tubes, 298 

 Fat-body, 161 

 Femur, 154 

 Fenestrse, 152 

 Fin-rays, 173, 216 

 Fins, 173, 205, 207, 216 

 Flabellum, 96 

 Flagellum, 81 

 Flame-cell, 3 

 Foot, of Anodon, 53, 56 



of gastropod, 84 



Foot-jaws, 95 

 Foramen magnum, 211 

 Foramina of skull, 213 



