632 



INDEX. 



Branchial heart, 374; Excretory 

 organs, 379. 



Dictocyrta— Shell, 83. 



Dicyema — Organism of, 68, 69. 



Didelpbia— Nipples, 422 ; Manus, 482. 



Didelphys — Vagina, 621; Erectile bodies, 

 623. 



Didemnuni — Colonies, 391. 



Difflugia — Supporting organs, 81. 



Digitigrada — Hallux, 491. 



Dimyaria — Internal skeleton, 342; Mouth, 

 359. 



Dinosaurii — Pelvis, 485. 



Diphyidse — Nectocalyces, 96 ; Generative 

 organs, 121. 



Diplopoda — Nervous system, 255. 



Dipnoi — Vertebral column, 428 ; Caudal 

 region, 431 ; Nasal canal, 521 ; Vesti- 

 bule, 534 ; Air-bladder, 568 ; Blood- 

 corpuscles, 576; Conus arteriosus, 

 578; Oviduct, 611. 



Diptera — Thorax, 237; Setae, 246; Labrum, 

 246; Wings, 248; Halteres, 248; 

 Ventral chord, 259 ; Auditory organ, 

 262; Stomach, 272; Mid-gut, 272; 

 Salivary glands, 274 ; Malpighian 

 vessels, 277 ; Tracheal vessels, 289 ; 

 Ovary, 302 ; Cement glands, 303. 



Discophora — Marginal filaments, 102 ; 

 Gelatinous disc, 107; Muscular 

 system, 108 ; Marginal vesicles, 110 ; 

 Gastro-vascular system, 114; Gastric 

 filaments, 116; Generative organs, 

 122. 



Distoma — Enteron, 158 ; Excretory or- 

 gans, 174 ; Shell-gland, 183. 



Dog— Manus, 483 ; Pelvis, 486. 



Doliolum — LarvEe, 390; Sensory organs, 

 397; Branchial slits, 402; Ventral 

 groove, 403 ; Sexual organ, 404. 



Dolium— Siphon, 322; Proboscis, 361; 

 Salivary glands, 364 ; Penis, 385. 



Dolphin— Pore-limb, 482. 



DorididsB — Branchiae, 338. 



Doridopsis — Liver, 366. 



Doris— Branchiae, 338 ; Arms, 362 ; Sali- 

 vary gland, 364; Liver, 365; Ves- 

 sels, 372; Eeceptaculum seminis, 

 384. 



Dromaeus — Auricle, 477 ; Columella, 538. 



Dysdera— Tracheae, 291. 



Dyssycus— Gastric system, 112. 



Dytiscns — Visual organ, 263; Stomach, 

 272; Hind-gut, 273. 



Ecardines— Shell, 308 ; Vascular system, 



312 ; Generative organs, 313. 

 Echidna — Pterygoids, 466 ; Dermal 



muscles, 493 ; Canals of Gartner, 617. 

 Echinida — Masticatory organs, 214 ; 



Stone-canal, 222. 

 Eohinocucumis — Integument, 207; 



" Lungs," 216. 



Echinoderes — Nervous system, 146 ; Ex 

 cretory organ, 174. 



Echinoderma — General review, 192 

 Classification, 193 ; Bibliography 

 194; General form, 194; LarvEc, 194 

 Muscular system, 207 ; Nervous sys 

 tern, 208 ; Sensory organs, 210 

 Alimentary canal, 211 ; Vessels, 217 

 Water vessels, 219 ; Stone-canal, 220 

 Excretory organs, 224; Generative 

 organs, 224. 



Echinoida — Dermal branchia;, 200 ; Cal- 

 careous skeleton, 202 ; Dermal 

 skeleton, 205 ; Internal skeleton, 

 205 ; Pedicellaria?, 206 ; Masticatory 

 apparatus, 206, 214 ; Spines, 206 ; 

 Muscular system, 207 ; Nervous sys- 

 tem, 209 ; Blood-vessels, 218 ; Stone- 

 canal, 222 ; Generative organs, 225. 



Echinorhynchus — Aciculi, 140 ; Genera- 

 tive organs, 186. 



Echinothurida — Dermal skeleton, 205 ; 

 Masticatory organs, 214. 



Echinus— Figure, 204; Pedicellariae, 206 ; 

 Nervous system, 209 ; Blood-vessels, 

 218 ; Stone-canal, 222 ; Generative 

 organs, 226. 



Echiurus — Ganglion cells, 148; Alimen- 

 tary canal, 161 ; Vascular system, 

 171 ; Excretory organs, 175. 



Edentata — -Scales, 418; Carapace, 426; 

 Sacral vertebraa, 436 ; Episternum, 

 444 ; Turbinate bones, 465 ; Pre- 

 maxiUae, 466; Centrale, 482 ; Cerebral 

 hemispheres, 509; Cerebellum, 510; 

 Stomach, 558 ; Arterial retia, 597 ; 

 Eenal organs, 605 ; Testes, 618. 



Eledone— ^Suckers, 327 ; Copulatory or- 

 gans, 328 ; Salivaiy glands, 364. 



Elephas— Nipples, 422; Milk teeth, 552; 

 Renal organs, 605 ; Prostatic glands, 

 619. 



Elysia — Branchiae, 339. 



Enaliosaurii — Hind-limb, 488. 



Enchytroeus — Central ganglia, 149. 



Enteropneusti — Branchial skeleton, 142 ; 

 Alimentary canal, 398. 



Entomostraca — Nauplius stage, 235 ; 

 Branchiae, 243; Eye, 264; Masticatory 

 stomach, 268 ; Liver, 275 ; Fat 

 bodies, 278 ; Excretory organ, 285 ; 

 Shell-gland, 286. 



Epeira— Eye, 266 ; Trachea3, 291. 



Ephemera — -Tracheal gills, 290. 



Ephemerida — Salivary glauds, 274; Ec- 

 dysis, 289; Tracheal gills, 290; Ovi- 

 duct, 302. 



Epistylis— Stalk, 83. 



Equus — Digits, 484 ; Stomach, 556. 



Erinaceus — Dermal muscles, 493. 



ErviUa — Pharynx, 85. 



Esox— Vertebrae, 430; Cartilaginous cra- 

 nium, 480 ; Eye, 529 ; Opercular gill 

 543. 



