INDEX TO VOLUME II. 



Abdominal muscles, 557 



Abdominal pore, 514, 616 



Acipeuser, development of, 84; affinities 

 of, 98 ; comparison of gastrula of, 233 ; 

 pericardial cavity of, 515 



Actinotrocha, 307 



Air-bladder of Teleostei, 63 ; Lepidosteuw, 

 97 ; blood supply of, 530 ; general ac- 

 count of, 627 ; homologies of, 680 



Alciope, eye of, 394 



Alisphenoid region of skull, 469 



Alimentary canal and appendages, deve- 

 lopment of, 62Q 



Alimentary tract of Ascidia, 15 ; Molgula, 

 18; Pyrosoma, 20; Salpa, 26 ; Elasmo- 

 brancnii, 43; Teleostei, 60 ; Petromyzon, 

 77, 79 ; Acipenser, 91 ; Amphibia, 107, 

 112 ; Chick, 139 ; respiratory region of, 

 623 ; temporary closure of oesophageal 

 region of, 624 



Allautois, development of in Chick, 159, 164; 

 blood-vessels of in Chick, 160 ; Lacerta, 

 170, 173 ; early development of in llabbit, 

 190, of Guinea-pig, 220 ; origin of, 257. 

 See aho ' I'laceuta ' and ' Bladder.' 



Alternation of generations in Ascidians, 

 origin of, 29; in Botryllus, 29; Pyro- 

 soma, 30; Salpa, 30; Doliolurn, 30 



Alytes, branchial chamber of, 112 ; yolk- 

 sack of, 115 ; branching, 116 ; Mullerian 

 duct of, 585 



Amblystoma, ovum of, 99; larva of, 117, 

 118 



Amia, ribs of, 463 



Ammoccetes, 78 ; metamorphosis of, 81 ; 

 eye of, 409 



Amnion, early development of in Chick, 

 154 ; later history of in Chick, 163 ; 

 Lacerta, 169, 173; Rabbit, 190; origin 

 of, 255, 257 



Amphibia, development of, 99 ; viviparous, 

 100 ; gastrula of, 231 ; suctorial mouth 

 of, 263 ; cereljellum of, 350 ; infundi- 

 bulum of, 355 ; pineal gland of, 357 ; 

 cerebrum of, 361 ; olfactory lobes of, 

 366 ; nares of, 439 ; notochord and its 

 sheath, 452 ; vertebral column of, 456 ; 



ribs of, 463 ; branchial arches of, 473 ; 

 mandibular and hyoid arches of, 479 ; 

 columella of, 479 ; pectoral girdle of, 

 496; pelvic girdle of, 498; limbs of, 

 509 ; heart of, 525 ; arterial system of, 

 531 ; venous system of, 538 ; excretory 

 system of, 582 ; vasa efferentia of, 586'; 

 liver of, 632 ; postanal gut of, 636 ; 

 stoniodffiurn of, 639 



Amphiblastula larva of Porifera, 285 



Amphioxus, development of, 1 ; gastrula 

 of, 229 ; formation of mcsoblast of, 243 ; 

 development of uotochord of, 243 ; head 

 of, 260; spinal nerves of, 380; ol- 

 factory organ of, 438 ; venous system of, 

 535 ; transverse abdominal muscle of, 

 555 ; generative cells of, 615 ; liver of, 

 632 ; postanal gut of, 634 ; stomodasum 

 of, 639 



Amphistylic skulls, 476 



Angular bone, 488 



Anterior abdominal vein, 537 



Anura, development of, 100 ; epiblast of, 

 103 ; rnesoblast of, 105 ; uotochord of, 

 105 ; hypoblast of, 107 ; general growth 

 of embryo of, 108 ; larva of, 111 ; ver- 

 tebral column of, 458 ; mandibular arch 

 of, 481 



Anus of Amphioxus, 6 ; Ascidia, 15 ; Py- 

 rosonia, 23 ; Salpa, 26 ; Elasmobranchii, 

 47 ; Amphibia, 108, 109 ; Chick, 139 ; 

 primitive, 268 



Appendicularia, development of, 28 



Aqueductus vestibuli, 427 



Aqueous humour, 409 



Arachnida, nervous system of, 337 ; eye 

 of, 396 



Area, embryonic, of rabbit, 180 ; epiblast 



of, 181 ; origin of embryo from, 188 

 area opaca of Chick, 124 ; epiblast, hypo- 

 blast, and mesoblast of, 132 

 area pellucida of Chick, 124 ; of Lacerta, 



167 



area vasculosa of Chick, 161 ; rnesoblast 

 of, 133 ; of Lizard, 173 ; Kabbit, 188, 

 190 



Arteria centralis retina;, 414 



412 



