S12 



INDEX 



Ccelome, 425 : Ambulacral system, 

 425 : Blood- vascular system, 426 : 

 Haemal system, 427 : Axial organ, 

 428 : Enteric canal, 429 : Nervous 

 system, 429 : Reproductive organs, 

 429 : Development, 430 : Ethology, 434 



Asthenosoma, 421 



Astracoidea, 570* 



Astrcea, 197, 198, 207 



Astropecten, 419, 420 



Astrophyton, 421 



Astrosphere, 17, 18* 



A tlanta peronii, 741 



Atrium, 249, 346 



Atrochal, 486* 



Attraction-sphere, 18* 



Auditory organs, 39, 645 



Aulacliniwm actinastrum, 62 



Aulostoma, 516, 522 



Aurelia aurita, External character- 

 istics, 168, 169 : Digestive-cavity and 

 canal system, 170, 171 : Cell-layers, 

 170 : Gonads, 171 : Gastric filaments, 

 172 : Muscular and nervous systems, 

 172 : Sense-organs, 172 : Development 

 and life-history, 173, 174, 175: 

 Systematic position, 177 



Auricle, of heart, 36* 



Auricles, of Sea-urchin, 397 : of Cteno- 

 phora, 223* 



Auriadaria, 404, 413, 431, 432 



Australian region, 9* 



Autolytns cornutus, 487 



Avicularium, 341, 342, 352* 



Axes, 42* 



Axial fibre, 92, 96, 97 



Axial nerve, 409 



Axial organ, 384, 400, 428 



Axial sinus, 380 



Axis-cylinder, 29*, 30 



B. 



B 



►alanus, 565, 577, 579 

 Barnacles, 3, 526, 565, 577, 579, 594, 



596 

 Barrier reef, 210 

 Basal plate, of coral, 205*, 206 

 Batteries, 161* 

 Bdelloida, 328*, 330, 334 

 Bdelloura, 284 

 Bear-animalcules, 673 

 Bee-parasites, 651 

 Bees, 526, 619, 636, 647, 652 

 Beetles, 525, 619, 635, 640 

 Belemnites, 790, 795, 796, 805 

 Benthos, 8* 

 Berenice, 150 

 Beroe, 224, 228 

 Beroida, 221*, 224 

 Bicellariidw, 348* 

 Bicellular glands, 493* 



Bilateral symmetry, 41, 43* 



Bile, 34* 



Binomial nomenclature, 1* 



Biology, 1* 



Bionomics, 9* 



Bipalium, 255 



Bipinnaria, 411, 432 



Bird-lice, 651 



Bird's-Head Coralline, 341 



Birgus, 569, 589, 595, 603 



Birth-opening, 245* 



Bivium, 377, 416 : of Sea-cucumber, 4<»1 



Black coral, 195*, 202, 210 



Blastoccele, 23* 



Blastoidea, 414*, 435, 437 



Blastomeres, 22* 



Blastopore, 22, 23* 



Blastosphere, 23* 



Blastostyle, of Obefia, 129*, 130 : Lepto- 

 linte, 151 : Porpita, 165, 166 



Blastula, 23* 



Blatta — See Periplaneta 



Blattidas, 636, 653 



Blepharoblast, 70*, 72 



Blood, 29*, 34* 



Blood-corpuscles. 30 



Blood- vascular system — See Vascular 

 system 



Blood-vessels, 34 



Blow -flies, 635 



Blue coral, 195 



Bodotria, 567 



Body-cavity — See Coelome 



Body-wall, of Sea-anemone, 185: Hormi- 

 phora, 215 : Liver-fluke, 241 : Platy- 

 helminthes, 262 : Nemertinea, 290 : 

 Ascnris, 298: Nematoda, 305: Chaato- 

 gnatha, 316 : Brachionux rubens, 325 : 

 Bugula, 343 : Ectoprocta, 351 : Mayel- 

 lania, 362 : Asterias, 381 : Sea-cucum- 

 ber, 402 : Nereis, 443 : Earthworm, 

 456 : Chsetopoda, 473 : Sipuncnbus, 493 : 

 Gephyrea, 497 : Hirudo, 508 : Apus, 

 531 : Astacvs, 546 : Crustacea, 594 : 

 Peripatus, 608 : Myriapoda, 617 : In- 

 secta, 636 



Bojanus, organs of, 689 



Bolina hydatina, 224 



Bone, 25, 27*, 28 



Bone-corpuscles, 27* 



BoneUia, 496, 497, 499, 500, 501 



Book-gills, 671 • 



Book-lungs, 657, 668 



Book-scorpions, 662 



Bopyrini, 586 



Bopyrus, 568 



Botany, 1* 



Bot-fly, 635, 651 



Bothridia, 262* 



Bothriocephalus, 261, 279, 285 



Bothriorephalus latus, 285 



Botryoidal tissue, of Leech, 509 



Bougainvillea, 143, 144, 152 



