592 



INDEX 



Aphis, 552 



Appendages, lateral, and their skele- 

 ton ; Frog, 5, 28, 36, 48, SI ; 

 Crayfish, 346, 349 ; Dogfish, 417, 

 426 ; Rabbit, 484, 486 ; Develop- 

 ment of in Vertebrates, 578, 



Aqueous chamber and humour, 



183 



Arachnoid fluid, 155 



Archenteron, 201, 558 



Archicerebrum, 366 



Area vasculosa, 572, 581, j'.?? 



Arm, see Fore-limb 



Arterial arches, 80, 436 



Arteries : Frog, 27, 80 ; Crayfish, 

 362 ; Mussel, 392 ; Do^sh, 433- 

 438 ; Rabbit, 503-506 ; Vertebrate 

 embryo, 572 



Arthobranch, 361 



Arthropoda, 220, 346, 370. 



Articular membrane, 347, 354 



Articular processes, see Zygapo- 

 physes 



Artificial selection, 227 



Arytenoid cartilage, 144, 500 



Ascaris, 153 



Asexual generation, see Agamo- 

 bium 



Asexual reproduction, see Fission, 

 Budding, Spore 



Assimilation, 149, 234, 300 



AsTACUS, see Crayfish 



Astragalus, 51, 487 



Astrosphere, 543 



Atlas vertebra, 481 



Atrial pore, 405 



Atrium, 404, 406 



Atrophy, see Vestige 



Auditory capsule, 39, 41, 420, 475 



Auditory organ : Frog, 45, 186; 

 Cravfish, 367 ; Mussel, 394 ; Dog- 

 fish, 449; Rabbit, ^\?i ; Develop- 

 ment of, in Vertebrates, 571, 



Auditory ossicles, 475, 519 

 Auricle, see Heart 

 Automatism, see Movements 

 Aves, 219, 403 



Axial fibre : of Vorticella, 276 ; of 



Carchesium, 281 

 Axial parts, 4 

 Axis fibre, see Neuraxis 

 Axis vertebra, 482 



B. 



JACTERIA, 152; Structure, 2571 



nutrition, 257 ; animals or plants? 



257 ; rapid multiplication, 282 ; 



practical directions, 260 

 Backbone, see Vertebral column 

 Basal cartilages of fins, or basalia, 



425-427 

 Bell of medusae, see Umbrella 

 Bilateral symmetry, 291 

 Bile, 69, 431 

 Bile-duct, 68, 431, 499 

 Bile-passages, .133 

 Binomial nomenclature, 215 

 Biogenesis, 282 

 Biology, I 

 Bird, development of, 563, 572, 576, 



578, ss? 



Birds, see Aves 



Bladder, see Gall-bladder and Uri- 

 nary bladder 



Blastocoele, see Segmentation-cavity 



Blastoderm, 369, 454, 563, sS6 



„ embryonic and extra- 



embryonic portions, 572, 

 578 



Blastodermic vesicle, 565, 584 



Blastomere, 556 



Blastopore, 201, 340, 369, 558, 562 



Blastula, 558 



Blind spot, j^g 



Blood : Frog, 20, 78, 85 ; Earth- 

 worm, 329, 330 ; Crayfish, 365 ; 

 Mussel, 392 ; Lancelet, 405 ; Dog- 

 fish, 442 ; Mammalia, 467 



Blood-corpuscles : colourless, see 

 Leucocytes ; red, 105, 442 



Blood-sinus, see Sinus 



Blood-vessels : Frog, 78, 107 ; 

 Earthworm, 329 ; Crayfish, 362 ; 



