INDEX 



Brachial disc, of Discomedusse, 188 



Brachial ossicles, 407 



Brachiolaria, 411, 432 



tirachionidw, 329* 



Bmchionu*, 324, 325, 326, 328, 329 



BRACHIONUS KI'HKNS : Exteinal charac- 

 ters, 323, 324 : Body-wall, 325 : Diges- 

 tive organs, 325 : Coelome, 325 : Ex- 

 cretory system, 326 : Nervous system, 

 and sense organs, 326 : Reproduction 

 and development, 326, 327 : Systematic 

 position, 329 



Brachiopoda, 340, 360* : Example, 360 

 Distinctive characters and classifica 

 tion, 366 : Systematic position of ex 

 ample, 367 : General organisation, 367 

 Shell, 367, 368 : Peduncle, 367 : Lo 

 phophore, 368 : Muscular system, 368 

 Enteric canal, 369 : Heart, 369 

 Nephridia, 369 : Nervous system, 369 

 Gonads, 369 : Development, 370, 371 

 Distribution, 371 



Brachyura, 569*, 589, 590, 591, 6<>1 



Bract, 160, 161*, 531 



Brain, 38 



Branchellion, 516, 517, 519, 522 



Branchiae, 35* : of Asterias, 376 : Sea- 

 urchin, 395 : Polychaita, 471 : Oligo- 

 chffita, 473 : Branchellion, 519 : 

 Astacus, 549 ; Crustacea, 593 : Ano- 

 donta, 686, 687, 688 : Pelecypoda, 702 : 

 Triton, 725 : Gastropoda, 742 



Branchial formula, of Antaeus, &c. , 551 



Branchiopoda, 563*, 569, 570, 571, 593, 

 594, 596, 597, 598, 602, 603, 677 



Branchipits, 563, 570, 571 



Branchiura, 565*, 573, 577 



Brine-shrimp, 571 



Bris ingidcs ,418 



Brood-pouch, 370, 531 



Brood-cavity, 101 



Brown body, 346 



Buccal cavity, 32 



Buccinum undatum, 722 



Budding, 40*, 41 See Asexual repro- 

 duction 



Budding, in Turballaria, 257 



Buffoii, 5 



Bugs, 634, 640, 651 



Bugula, 347 



BUGULA AVIGULAKIA, 341, 342: Body- 

 wall, 343 : Ccelome, 343 : Alimentary 

 canal, 343 : Nervous system, 343 : 

 Excretory organs, 343 : Reproductive 

 organs, 344 : Development, 344, 345, 

 346 : Systematic position, 348 

 Bugula plumosa, 346 

 Bursa copulatrix, 270, 271, 272, 273, 647 

 Busycon, 749 



BUTHUS, 653 : External features, 654, 

 655 : Digestive system, 656, 657, 658 : 

 Circulatory organs, 656, 657 : Organs of 

 respiration, 657 : Nervous system, 657, 



VOL. I 



658 : Organs of special sense, 658 : Re 

 productive organs, 658 : Development, 

 659 



Butterflies, 526, 619, 635 



Byssus, 694, 702 



Byssus-gland, 694, 702 



Byssus, provisional, 693 



G 



C 



ADDIS-FLIES, 633 



Cake-urchins, 412*, 417, 423 

 Calcarea, 112*, 120, 122, 123 

 Calcareous spicules, of Sponges, 107, 108, 



120, 122 



Calciferous glands, 458 

 Callianira, 218, 219, 222 

 Callitiara, 150 

 CcUocalanus, 574 

 Calotte 230*, 344 

 Calymma, of Radiolaria, 60 

 Calyptoblastea 143* 

 Oambaruf, 569 

 Cambrian, 7 

 Campan ulariidw, 1 42* 

 Canaliculse (bone), 27* 

 Canals, Haversian, 27*, 28: incurrent, 



radial or flagellate, excurrent of 



Sponge, 107, 108, 109*, 117 : of Medusa. 



135, 136 



Canal system of Sponges, 117, 118 

 Cancer, 569, 590 

 Cannostomae, 180 

 Capillaries, 35* 

 Capillary vessels, 238 

 Capillitium, of Mycetozoa, 66, 67 

 Caprella, 568, 586 

 Capria, 178 



Capsulogenous glands, 457 

 Carabus aurafus, 641 

 Carapace, Apus, 527: A*tnmx, 540: 



of Scorpion, 654 

 Carboniferous, 7 

 Cardiac sac, of Polychreta, 476 

 Cardinal process, 360* 

 Cardium, 696, 698, 701, 711 

 Jarina, of Cirripedia, 578 

 larinaria mediterranea , 739 

 Jarp-lice, 565 

 Carpoidea, 414*, 435 

 Cartilage, 25, 26* : Hyaline, 26, 27 : 



Fibrous, 26, 27 : Yellow elastic, 26 : 



Calcified, 27 



OaryophyttcBus, 262, 263, 287 

 Cassiopeia, 184 

 Caudal spine, 661 i 

 Caudal styles, of Apu*, 527 

 Caudal vesicle, 248*, 280 

 Cell, animal, 14, 16* 

 Cell, 14, 16*. 17: Forms, 23: Ciliated, 



23, 45 : Flagellate, 24, 45 : Amteboid, 



45 : Encysted, 45 



3 F 



