646 



INDEX. 



minal pores of, 515 ; segmental duct of, 

 577; pronephros of, 577; mesonephros 

 of, 577; generative ducts of, 603, 616; 

 venous system of, 535; excretory organs 

 of, 577 

 Cystignathus, oviposition of, 100 



Dactylethra, branchial chamber of, 112 j 

 branchiae of, 112; tadpole of, 115 



Decidua reflexa, of Rat, 200; of Insecti- 

 vora, 202 ; of Man, 203 



Deiter's cells, 433 



Dental papilla, 641 



Dental capsule, 641 



Dentary bone, 488 



Dentine, 641 



Descemet's membrane, 408 



Diaphragm, 518 ; muscle of, 557 



Dipnoi, nares of, 440; vertebral column 

 of, 452 ; membrane bones of skull of, 

 487 ; heart of, 525 ; arterial system of, 

 530; excretory system of, 582; stomo- 

 daeum of, 639 



Diptera, eye of, 395 



Discophora, excretory organs of, 567 



Dog, placenta of, 206 



Dohrn, on relations of Cyclostomata, 69 ; 

 on ancestor of Chordata, 258, 264 



Doliolum, development of, 23 



Ductus arteriosus, 533 



Ductus Botalli, 532 



Ductus Cuvieri, 537 



Ductus venosus Arantii, 547 



Dugong, heart of, 528 



Dysticus, eye of, 395 



Ear, see 'Auditory organ' 



Echinodermata, secondary symmetry of 

 larva of, 313 ; excretory organs of, 568 ; 

 generative ducts of, 619 



Echinorhinus, lateral line of, 444; verte- 

 bral column of, 452 



Echiurus, excretory organs of, 566 



Ectostosis, 448 



Edentata, placenta of, 205, 207, 213 



Eel, generative ducts of, 580 



Egg-shell of Elasmobranchii, 33; Chick, 

 121 



Elasmobranchii, development of, 83; vi- 

 viparous, 33; general features of de- 

 velopment of, 45 ; gastrula of, 233 ; de- 

 velopment of mesoblast of, 244; noto- 

 chord of, 244; meaning of formation of 

 mesoblast of, 245; restiform tracts of, 

 350; optic lobes of, 352; cerebellum of, 

 350; pineal gland of, 356; pituitary 

 body of, 359 ; cerebrum of, 361 ; olfac- 

 tory lobes of, 366; spinal nerves, 369; 

 cranial nerves of, 376; sympathetic 

 nervous system of, 384; nares of, 439; 

 lateral line of, 444 ; vertebral column of, 

 453 ; ribs of, 462 ; parachordals of, 467 ; 

 mandibular and hyoid arches of, 474; pec- 

 toral girdle of, 493; pelvic girdle of, 



498; limbs of, 500; pericardial cavity 

 of, 515; arterial system of, 530; venous 

 system of, 535; muscle-plates of, 551; 

 excretory organs of, 569; constitution 

 of excretory organs in adult of, 575 ; 

 spermatozoa of, 615; swimming-bladder 

 of, 628 ; intestines of, 631 ; liver of, 632 ; 

 l^ostanal gut of, 634 



Elffioblast of Pyrosoma, 23; Salpa, 25 



Elephant, placenta of, 207 



Embolic formation of gastrula, 276 



Enamel organ, 641 



Endolymph of ear, 430 



Endostosis, 448 



Endostyle of Ascidia, 15, 624 ; Pyrosoma, 

 21 ; Salpa, 27 



Epiblast, of Elasmobranchii, 38 ; Teleostei, 

 57, 60 ; Petromyzon, 71 ; Lepidosteus, 

 92; Amphibia, 101, 103; Chick, 124, 

 138 ; Lacerla, 168 ; Eabbit, 179, 181 ; 

 origin of in Eabbit, 184 ; comparative 

 account of development of, 249 



Epibolic formation of gastrula, 277 



Epichordal formation of vertebral column, 

 458 



Epicrium glutinosum, 118 



Epidermis, in Ccelenterata, 325 ; protective 

 structures of, 325 



Epididymis, 597 



Epigastric vein, 537 



Episkeletal muscles, 557 



Episternum, 494 



Epoophoron, 597 



Ethmoid bone, 490 



Ethmoid region of skull, 470 



Ethmopalatine ligament of Elasmo- 

 branchs, 475 



Euphausia, eye of, 398 



Eustachian tube, of Amphibia, 111 ; Chick, 

 149 ; Rabbit, 192 ; general development 

 of, 435 



Excretory organs, general constitution of, 

 561 ; of Platyelminthes, 561 ; of Mol- 

 lusca, 562 ; of Polyzoa, 563 ; of Brachi- 

 opoda, 563 ; of Chaetopoda, 563 ; of 

 Gephyrea, 566 ; of Discophora, 567 ; of 

 Arthropoda, 567 ; of Nematoda, 568 ; of 

 Echinodermata, 568 ; constitution of in 

 Craniata, 568 ; of Elasmobranchii, 569 ; 

 constitution of in adult Elasmobranch, 

 575 ; of Petromyzon, 577 ; of Myxine, 

 578 ; of Teleostei, 578 ; of Ganoidei, 580 ; 

 of Dipnoi, 582 ; of Amphibia, 582 ; of 

 Amniota, 588 ; comparison of Vertebrate 

 and Invertebrate, 607 



Excretory system, of Elasmobranchii, 40; 

 Teleostei, 63 ; Petromyzon, 78, 81 ; 

 Acipenser, 91 ; Amphibia, 110 



Exoccipital bone, 489 



Exoskeleton, dermal, 325 — 327 ; epider- 

 mal, 325—328 



External generative organs, 5D9 



Extra-branchial skeleton, 471 



Eye, of Ascidia, 14 ; Salpa, 26 ; Elasmo- 



