INDEX 



373 



A try pa, ISO 

 Aturia, 265 

 Aucella, 214 



Aulacoceras, 284 

 Aulacothyris, 183 

 Aurelia, 73 



Auricles (Echiuoidea), 124 

 Auriform gasteropods, 237 

 Autozooids, 96 

 Auxiliary lobes, 267 

 Avellana, 249 

 Avicula, 213 

 Avicularia, 190, 194 

 Aviculopecten, 216 

 Axial caual, 35 



„ furrow, 293 

 Axillare, 139 

 Axincea, 211 

 Axis (Trilobita), 297 



Bactrites, 269, 287 

 Baculites, 273 

 Bairdia, 315 

 Bakevellia, 231 

 Bala mis, 316, 317 

 Barbados Earth, 30 

 Barnacles, 316 

 Barroisia, 46 

 Basal budding, 81 



,, epitbeca, 81 



,, plates, 139, 149 

 Basipodite, 290 

 Bees, 337 ' 

 Beetles, 336 

 Belemnitella, 284 

 Belemnites, 281 

 Belemnoteuthis, 284 

 Belinurus, 342 

 Bellerophon, 239 

 Beloptera, 287 

 Belosepia, 283, 286 

 Berenicea, 192 

 Beyrichia, 314 

 Bigeminal, 120 

 Bilateral symmetry, 75, 86, 124, 



129, 196, 231, 237, 256, 289 

 Bilobites, 177 

 Biloculina, 22 

 Biplication, 168 

 Biramous appendages, 290, 318, 



323, 327 

 Biserial crinoids, 139 



Biserial graptolites, 58 

 Bivalved carapace, 312, 313, 319 



shells, 160, 197 

 Blastoidea, 149-155 

 Blastoidocrinus, 155 

 Blastostyle, 53 

 Blattidas, 335 

 Blue coral, 96 

 Body-cavity, 105, 160, 197 

 Body-chamber, 261 

 Book-scorpions, 354 

 Boring lamellibranchs, 10, 209 

 Boss, 122 



Bothriocidaris, 121, 133 

 Botryocrinus, 142 

 Bougainvillea, 53 

 Bourguetia, 254 

 Bourgueticrinus, 144 

 Brachial plates, 139 



,, skeleton, 166, 167 

 Brachiole, 146, 148, 153 

 Brachiopoda, 160-187 

 Bracliylepas, 317 

 Brachymetopus, 311 

 Brachyura, 330 

 Branchiae, 110, 123, 199, 289 

 Branchial siphon, 200 

 Branchiopoda, 312 

 Branchipus, 302 

 Brittle-stars, 112 

 Bronteus, 307 

 Bryograptus, 68 

 Bryozoa, 188-195 

 Buccal plate, 113 

 Buccinopsis, 255 

 Baccinum, 245 

 Budding (corals), 80 

 Bulla, 249 

 Bunodes, 342 

 Butterflies, 335 

 Byssal sinus, 209 

 Byssus, 199, 209 



Caddis-flies, 335 

 Cadomella, 187 

 Calamary, 279 

 Calamophyllia, 104 

 Calcarea, 45, 47 

 Calcarina, 24 

 Calceocrinus, 145 

 Calceola, 91 

 Calcispongise, 45 



