INDEX TO VOLUME III. 



Abdominal muscles, 675 



Abdominal pore, 626, 749 



Acipenser, development of, 102; affinities 

 of, 118; comparison of gastrula of, 279; 

 pericardial cavity of, 627 



Actinotrocha, 373 



Air-bladder of Teleostei, 77; Lepidosteus, 

 117; blood supply of, 645 ; general ac- 

 count of, 763 ; homologies of, 766 



Alciope, eye of, 480 



Alisphenoid region of skull, 569 



Alimentary canal and appendages, deve- 

 lopment of, 754 



Alimentary tract ofAscidia, 18; Molgula, 

 22; Pyrosoma, 24; Salpa, 31 ; Elasmo- 

 branchii, 52; Teleostei, 75; Petromy- 

 zon, 93, 97; Acipenser, no; Amphi- 

 bia, 129, 136; Chick, 167; respiratory 

 region of, 754; temporary closure of 

 cesophageal region of, 759 



Allantois, development of in Chick, 191, 

 198; blood-vessels of in Chick, 193; 

 Lacerta, 205, 209; early development of 

 in Rabbit, 229, of Guinea-pig, 264; 

 origin of, 309. See also ' Placenta ' and 

 'Bladder' 



Alternation of generations in Ascidians, 

 origin of, 35 ; in Botryllus, 35 ; Pyro- 

 soma, 36; Salpa, 36; Doliolum, 36 



Alytes, branchial chamber of, 136; yolk- 

 sack of, 139; branchioe, 141 ; Miillerian 

 duct of, 710 



Amblystoma, ovum of, 120; larva of, 142, 



143 



Amia, ribs of, 561 

 Ammocoetes, 95 ; metamorphosis of, 97 ; 



eye of, 498 

 Amnion, early development of in Chick, 



185; later history of in Chick, 196; 



Lacerta, 204, 210; Rabbit, 229; origin 



of, 37, 39 



Amphibia, development of, 120; vivi- 

 parous, 121; gastrula of, 277; suctorial 

 mouth of, 317; cerebellum of, 426; in- 

 fundibulum of, 431; pineal gland of, 

 433 ; cerebrum of, 439 ; olfactory lobes 

 of, 444; nares of, 553; notochord and 

 its sheath, 548; vertebral column of, 

 554; ribs of, 561 ; branchial arches of, 

 574; mandibular and hyoid arches of, 

 582 ; columella of, 582 ; pectoral girdle 

 of, 605; pelvic girdle of, 607; limbs of, 

 619; heart of, 638; arterial system of, 

 (145 ; venous system of, 655 : excretory 



system of, 707 ; vasa efferentia of, 711; 

 liver of, 769; postanal gut of, 774; 

 stomodaeum of, 778 



Amphiblastula larva of Porifera, 344 



Amphioxus, development of, i ; gastrula 

 of, 275 ; formation of mesoblast of, 292 ; 

 development of notochord of, 293; head 

 of, 314; spinal nerves of, 461; ol- 

 factory organ of, 462 ; venous system 

 of, 651; transverse abdominal muscle 

 f, 673; generative cells of, 748; liver 

 f, 7 O 9; postanal gut of, 772; stomo- 

 dseum of, 777 



Amphistylic skulls, 578 



Angular bone, 594 



Anterior abdominal vein, 653 



Anura, development of, 121; epiblast of, 

 125; mesoblast of, 128; notochord of, 

 128; hypoblast of, 129; general growth 

 of embryo of, 131; larva of, 134; ver- 

 tebral column of, 556 ; mandibular arch 

 of, 584 



Anus of Amphioxus, 7; Ascidia, 18; Py- 

 rosoma, 28 ; Salpa, 31 ; Elasmobranchii, 

 57; Amphibia, 130, 132; Chick, 167; 

 primitive, 324 



Appendicularia, development of, 34 



Aqueductus vestibuli, 519 



Aqueous humour, 497 



Arachnida, nervous system of, 409; eye 

 of, 481 



Area, embryonic, of Rabbit, 218; epiblast 



of, 219; origin of embryo from, 228 



area opaca of Chick, 150; epiblast, 



hypoblast, and mesoblast of, 159 

 area pellucida of Chick, 150; of La- 

 certa, 202 



area vasculosa of Chick, 194; meso- 

 blast of, 1 60; of Lizard, 209; Rabbit, 

 228, 229 



Arteria centralis retinae, 503 



Arterial system of Petromyzon, 97; con- 

 stitution of in embryo, 643 ; of Fishes, 

 644; of Amphibia, 645; of Amniota,647 



Arthropoda, head of, 313; nervous system 

 of, 409 ; eye of, 480 ; excretory organs 

 of, 688 



Articular bone of Teleostei, 581; of Sau- 

 ropsida, 588 



Ascidia, development of, 9 



Ascidians. See ' Tunicata ' 



Ascidiozooids, 25 



Atrial cavity of Amphioxus, 7; Ascidia, 

 18; Pyrosoma, 24 



