INDEX 



AMPHIOXUS : segmentation of ovum, 5 ; 

 development of body-cavity, 8 ; inte- 

 gument, 16 ; notochord, 36 ; central 

 nervous system, 157 ; nerves, 178, 179, 

 189 ; sense-organs, 190, 197, 211 ; 

 lateral or metapleural folds, 104 ; 

 muscles, 137 ; mouth, 239 ; alimentary 

 canal, 257, 267 ; liver, 269 ; gills, 275 ; 

 blood-vessels and corpuscles, 299 1 

 urinary organs, 348 ; generative organs, 

 359 (Compare Fig. 219) 



CYCLOSTOMES : segmentation of ovum, 5; 

 integument, 16 ; vertebral column, 36 ; 

 skull, 72 ; median fins, 103 ; muscles, 

 137, 142 ; brain, 157 ; spinal nerves, 

 179, 189 ; sense-organs of the integu- 

 ment, 191, 193 ; olfactory organ, 197 ; 

 eye, 211 ; auditory organ, 224 ; mouth, 

 239 ; horny teeth, 241 ; tongue, 252 ; 

 thyroid, 255 ; alimentary canal, 257, 

 259, 267 ; liver, 271 ; pancreas, 272 ; 

 gills, 275 ; genital pores, 298 ; blood- 

 corpuscles, 300 ; heart, 305 ; veins, 

 322, 326 ; urinary organs, 349 ; genera- 

 tive organs, 359 



FISHES : integument, 16 ; exoskeleton, 

 30 ; vertebral column, 37 ; ribs, 54 ; 

 skull, 74-81 ; unpaired fins, 103 ; 

 paired fins, 104 ; pectoral arch, 106 ; 

 pelvic arch, 109 ; free limbs, 122 ; 

 parietal muscles, 137 ; visceral muscles, 

 142 ; muscles of the appendages, 142 ; 

 electric organs, 146 ; spinal cord, 151 ; 

 brain, 159-165 ; spinal nerves, 179 ; 

 cerebral nerves, 180 ; sympathetic, 188; 

 sense-organs of the integument, 190- 

 193; olfactory organ, 198; eye, 211 ; 

 retina, 214 ; eye-muscles and eyelids, 

 216, 217 ; auditory organ, 224 ; rela- 

 tions of auditory organ with air- 

 bladder, 226 ; teeth, 241 ; tongue, 252 ; 

 thyroid, 255 ; thymus, 256 ; alimentary 

 canal, 257, 267 ; liver, 269 ; pancreas, 



272 ; gills, 273, 276 ; air-bladder, 273, 

 280 ; abdominal and genital pores, 298 ; 

 heart and vessels, 300, 305 ; arteries, 

 319 ; veins, 302 ; retia mirabilia, 333 ; 

 lymphatic system, 333 ; spleen, 335 ; 

 nutrition of embryo, 336 ; urinary 

 organs, 350 ; generative organs, 360 ; 

 claspers, 377 ; suprarenal bodies, 385 



DIPNOANS : integument, 16 ; exoskele- 

 ton, 31 ; vertebral column, 37 ; ribs, 

 54 ; skull, 81 ; unpaired fins, 103 ; 

 pectoral arch, 107; pelvic arch, 111 ; 

 free limbs, 122 ; parietal muscles, 137 ; 

 muscles of the appendages, 142 ; brain; 

 165 ; cerebral nerves, 180 ; sense- 

 organs of the integument, 190-193 ; 

 olfactory organ, 199; eye, 211 ; audi- 

 tory organ, 224 ; teeth, 243 ; tongue, 

 252.; thyroid, 255 ; thymus, 257 ; ali- 

 mentary canal, 257, 267 ; pancreas, 

 272 ; gills, 278 ; lungs, 283, 288 ; ab- 

 dominal pore, 278 ; heart, 307 ; blood- 

 vessels, 319, 326 ; spleen, 335 ; urinary 

 organs, 352 ; generative organs, 361 



AMPHIBIANS : segmentation of ovum, 

 5 ; integument, 18 ; exoskeleton, 20, 33; 

 vertebral column, 42 ; ribs, 55 ; sternum, 

 58 ; episternum, 62 ; skull, 82, 88 ; 

 median fins, 183 ; pectoral arch, 107 ; 

 pelvic arch, 111 ; free limbs, 127 ; 

 parietal muscles, 137 ; visceral 

 muscles, 143 ; muscles of the appen- 

 dages, 142 ; spinal cord, 152 ; brain, 

 166 ; spinal nerves, 179 ; cerebral 

 nerves, 180 ; sympathetic, 189 ; sense- 

 organs of the integument, 190, 193 ; 

 tactile cells, 175 ; olfactory organ, 200 ; 

 Jacobson's organ, 205 ; eye, 212 ; 

 retina, 214 ; eye-muscles and eyelids, 

 216, 217 ; glands of the eye, 218 ; 

 auditory organ, 226 ; teeth, 243 ; glands 

 of the mouth, 251 ; tongue, 253 ; thy- 

 roid, 255 ; thymus, 257 ; alimentary 



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