476 



INDEX. 



Arthrobranchs, 314 

 Arthropoda, 322, 440 

 Arthrostraca, 441 

 Articulation, 306 

 Aspidogastera, 437 

 Assimilation, 40 

 Association of ideas 91 

 Astacus, 301 

 Aster, 44 



Astragalus, 77, 150 

 Atlas, 69, 147 

 Atriopore, 193 

 Atrium, 194, 204, 227, 238 

 Auditory capsules, 169 



,, organ, 113, 154, 187, 275, 

 320, 333 



,, ossicles, 82, 113, 154, 165, 



275 



Auricles, 27, 142, 176 

 Autostylic skull, 181 

 Aves, 452 

 Axial skeleton, 66 

 Axis, 69 



,, -cylinders, 89 



T)ACTERIA, 17 

 Jj Basi-branchial, 181 

 -hyal, 181 

 ,, -occipital, 80 

 ,, podite, 304 

 ,, -pterygium, 183 

 ,, -sphenoid, 80, 1GG 

 Bile, 16, 61 



,, -duct, 61, 86, 140, 174 

 Bladder, Urinary, 63, 141, 269 

 Bladder-worm, 372 

 Blastoderm, 249 

 Blastodermic vesicle, 263 

 Blastogenic, 287 

 Blastomeres, 371 



Blastopore, 223, 231, 252, 263, 315 

 Blastosphere, 222, 229 

 Blastostyle, 390, 393, 394 

 Blind spot, 117, 277 

 Blood, 57, 225 



,, of amphioxus, 200 

 ,, ,, crayfish, 314 

 ,, dogfish, 179 

 ,, ,, earthworm, 340 

 frog, 167 

 rabbit, 20, 67 

 Blood-vessels of earthworm, 340 



Blood-vessels of mussel, 330 



(See also Arteries, Capillaries, 



Veins.) 

 Blood-vessels, Origin of, 270 



,, ,, , Structure of, 87 

 Bojanus, Organ of, 331 

 Bone, 63, 157, 273 

 Botallus, Duct of, 142, 24G 

 Bowman's capsule, 64, 241 

 Brachyura, 441 

 Brain, 100, 150, 184 

 Branchial heart, 331 

 Branchiocardiac groove, 302 

 Branchiostegite, 302 

 Breathing (see Respiration). 

 Bronchi and bronchioles, 36, 268 

 Budding, 383 

 Bulb, 103, 120, 152, 185 

 Bulbus asteriosus, 143, 176 

 Bulla, 80 

 Byssus, 334 



, 16, 19 

 \J Calcaneum, 77, 150 

 Calcar, 150 



Calciferous glands, 339 

 Canaliculi, 64 

 Canines, 14, 80, 81 

 Capillaries, 18, 21, 31, 63 

 Capitulum, 66 

 Carapace, 302 

 Carbohydrates, 13 

 Cardiac, 310 

 Carotid gland, 142 

 Carpopodite, 304 

 Carpus, 74, 149 

 Cartilage, 21, 52, 179, 273 

 -bone, 54, 83, 161 

 Castration, 290 

 Caudal vertebrae, 71 

 Cell, 42 



,, -anus, 401 



y, -mouth, 401 



,, -products, 42, 45 



,, wall, 40 

 Cellulose, 13, 19, 40 

 Cement, 67 



Central nervous system, 89, 96 

 Centrolecithal, 321 

 Centrosome, 43 

 Centrosphere, 43 

 Centrum, 66, 179, 273 



