INDEX 



691 



Balanoglossus, 662; 633, 660 



Balantidiimi, 109; 20; entosoon, 109 



Balanus, 382 ; 381 



Basal disc, 189 



Basal granule, 15 



Basal ossicles, 656 



Basement membrane, 204 



Basilar plate, 424 



Basipodite, 336 



Basommatophora, 570 



Bathynella, 392 



Bdellocephala, 212 



Bdelloid rotifers, 243 



Beaks of Cephalopoda, 594 



Beds, Mussel, 583 



Behaviour, 38; of Protozoa, 38 



Belemnites, 600 



Belemnoidea, 588, 600 



Bembex, 503 



Berlese's theory, 459; 458 



Beroe, 196 



Bibio, 508; 508 



Bilateral cleavage, 145 



Bilateral symmetry, 633; of Actino- 

 zoa, 182; of Ciliata, 8; of Echino- 

 derm larvae, 623, 627, 633; of 

 Echinoidea, 624, 647 ; of Holo- 

 thuroidea, 624, 649 ; of Metazoa, 143 



Bilharzia, see Schistosoma 



Binary fission of Protozoa*, 28 ; 36, 

 45, 54, 70, 72, 74, 80, 83, 85, 86, 

 98, 115 



Bipaliimi kewense, 215 



Bipinnaria larva, 632; 632 



Biramous limb, see Stenopodium 



Birgus, 415 



Bladder worm, see Cysticercus 



Blastocoele, 129; i, 131, 133, 237 



Blastoidea, 659 



Blastopore, 129, 130 and n. 



Blastostyles, 154 



Blastozoite, see Blastozooid 



Blastozooid, 679 ; 685 



Blastula, 129, 145 ; of Coelenterata, 

 152; of Echinodermata, 631; of 

 Obelia, 156 



Blatta, 428, 433, 466 ; orientalis, 466 



Blepharoplast, 15 n. 



Blood, 131, 132, 133; of Arenicola, 

 273, 275; of Chaetopoda, 263; of 

 Ciona, 674; of Crustacea, 351; of 

 Insecta, 439; of Scorpion, 522 



Blood vessels, see Arterial system. 

 Artery, Vascular system 



"Blood vessels" of Echinodermata, 



see Lacunar system 

 Bodo, 63 ; saltans, 62 ; sulcatus, 

 Chemophobotaxis of, 39, 40 



Body, of Amphipoda, 400 ; of Areni- 

 cola, 272 ; of Balanoglossus, 662 ; of 

 Cephalodiscus and Rhabdopleura, 

 668; of Crustacea, 332; of Cteno- 

 phora, 195; of Echinodermata*, 

 623, 640, 648; of Isopoda, 395 ; of 

 Medusa, 150; of Metazoa, 128; of 

 polyp, 150; of Porifera, 117; of 

 Protozoa, 8; of Tubicoleus Poly- 

 chaeta, 270. See also Symmetry 



Body cavity, of Nematoda, 245 ; 

 Perivisceral, see Perivisceral cavity ; 

 Primary, see Haemocoele; Secon- 

 dary, see Coelom 



Body wall, of Hirudinea, 298 , of 

 Holothuroidea, 650; of Metazoa, 

 128, 129; of polyps, 150; of Roti- 

 fera, 237 



Bofubus, 498, 503, 504 



Bonibyx mori, 490 



Bonellia, 302 ; viridis, 303 



Boophilus annulatus, 537; bovis, 537 



Bopyrus, 29^', /(JUgsrouxi, 400 



Bothriotaenia, 230 



Botryllus, 681; 678, 678, 679; vio- 

 laceus, 681 



Botryoidal tissue, 298 



Bougainvillea, 157; 158, i6s', fruc- 

 tuosa, 157 



Brachial ossicles, 656 



Brachial skeleton, 6i6 



Brachiolaria larva, 633 



Brachioles, 658 



Brachiopoda, 613; 2; Development 

 of, 617 



Brachyura, 404, 407 



Brachyurous type, 404 



Brain, 136; 138, 144; of Acantho- 

 cephala, 259; of Acoelomate Tri- 

 ploblastica, 197; of Arthropoda, 

 309; of Branchiopoda, 340; of 

 Ciona, 675 ; of Crustacea, 340 ; of 

 Insecta, 448, 449; of Nemato- 

 morpha, 257; of Polychaeta, 264; 

 "of Sepia, 596, 596. See also 

 Ganglion, Cerebral 



Branchia, of Phyllopodium, 337, 354; 

 oi Salpa, see'' GiW 



Branchiae, see Gills 



Branchial chamber, 672 



