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Architectonica, 142 gramilat-a, 143 krebsi, 143, pi. 4-0; 2iy nobilis, 142, 143, pi. 4m peracuta, 143, pi. 411; fig. 2 2g Architeuthis, 483 harveyi, 483, fig. 99c princeps, 483 Arcidae, 341 arcinella, Echinochama, 394, pi. 37h Arcopagia fausta, 428, pi. 40) Arcopsis adamsi, 343, 344, fig. 26b arctatum, Mesodesma, 451, pi. 321 Arctica islandica, 381, pi. 32f arctica, HiateDa, 452, fig. 92a arctica, Panomya, 453 arctica, Saxicava, 452 Arcticidae, 381 Arctomelon stearnsi, 251 arenaria, Mya, 41, 455, pi. 32X arenarius, Murex, 204 Arene, 122 cruentata, 122 gemma, 122, pi. i7q vanhyningi, 122 variabilis, 123, pi. 17s venustula, 122 arenosa, Lyonsia, 468 arenosa, Pandora, 470 Argim, 345 Arghiarca, 345 argo, Argonauta, 485, pis. ic, 26y Argobuccinum oregonense, 194, pi. 24g Argonauta, 485 americana, 485 argo, 485, pis. ic, 26y hians, 485, fig. 996, f aristata, Lithophaga, 357, pi. 29J armandina, Trivia, 177 Asaphis deflorata, 439, pi. 40a asmi, Acmaea, 104 aspera, Diodora, 97, pi. 1 8b aspera, Mitromorpha, 273, fig. 57m aspinosus, Rhizorus, 281 asser, Cingula, 135 assimilis, Haliotis, 93, pi. 2d Astarte, 375 borealis, 375, pi. 28q castanea, 376, pi. 28s nana, 374 subequilatera, 375, 376, pi. 28-0 undata, 376, pi. 2 8r Astartidae, 375 Astraea, 123 americana, 124, pi. 3! brevispina, 123, pi. 3-I caelata, 124, pl. 3h gibberosa, 125, fig. 35 guadeloupensis, 124 imbricata, 124 inaequalis, 125 longispina, 123, pl. 3k, m spinulosa, 123, pl. 3m tuber, 124, pl. 3J undosa, 124, pl. i8p Scientific Na7nes Astralium, 123 astriger, Acanthochitona, 318 Astyris, 223 atacellana, Nucula, 335, fig. 700 Atlanta peroni, 184, fig. 41 atlantica, Charonia, 197 atlanticus, Glaucus, 309 atlanticus, Pleurobranchus, 286, fig. 61 Atlantidae, 184 atra, Polycera, 305, pl. i6e Atrina, 360 rigida, 360, pl. 27X serrata, 360, pl. 27V atropurpurea, Ocenebra, 217 attenuatum, Bittium, 156 Atydae, 278 Atys, 278 caribaea, 278, fig. 59c sandersoni, 278, fig. 59d aulaea, Haliotis, 93 aurantia, Catriona, 308, pl. 15J aureocincta, Alarginella, 254, fig. 56b aureofasciatus, Conus, 260, pl. i4g aureotincta, Tegula, 120, pl. i8k auricula, Crucibulum, 169, pl. 21s amicnlata, Anadara, 344 Aurinia, 251 auritula, Cantharus, 233 Austrotrophon, 200 a vara, Anachis, 221, pl. 25ee avena, Hyalina, 258, pl. up; fig. 56! avena, Neosimnia, 183, pl. 7g avenacea, Hyalina, 259, fig. 56k avenella, Hyalina, 259 bacula, Homalopoma, 126 badistes, Aplysia, 286 bacri, Buccinum, 226, pl. 24V baetica, Olivella, 247, pl. 2oq Bailya, 231 intricata, 231, pl. 25t parva, 231 bailyi, Barbatia, 343 bairdi, Calliostoma, 113, pl. 3-0 bairdi, Liotia, 121, pi. 17U bairdi, Lischkeia, 109, pl. 3c bakeri, Caecum, 150 bakeri, Rissoina, 137 balanthmi, Clio, 295 balea, Limacina, 292 balea, Spiratella, 292 balesae, Acanthochitona, 318 balesi, Area, 343 balesi, Pseudomalaxis, 139 balthica, Macoma, 431, fig. 88g Bankia, 465 canalis, 467 caribbea, 466, fig. 95e fimbriatula, 467, fig. 95f gouldi, 42, 466, figs. 16, 95d mexicana, 466 Bankiella, 466 Bankiopsis, 466 barbadensis, Fissurella, 100, pl. i-ji barbadensis, Mitra, 249, pl. 26d 519 barbarensis, Fusinus, 244, pl. 24Z barbarensis, Neosimnia, 183 Barbarofusus, 243 barbata, Barbatia, 343 Barbatia, 342 bailyi, 343 barbata, 343 cancellaria, 343, pl. 27q Candida, 342, 343, pi. 27r domingensis, 343, pl. 27U helblingi, 343 jamaicensis, 343 tenera, 343, pl. 27k barbatus, Hipponix, 167 barkleyensis. Caecum, 148 Barnea, 460 costata, 41, 460, fig. 94a pacifica, 462 spathulata, 461 truncata, 461 barrattiana, Corbula, 458, fig. 93a bartrami, Sthenoteuthis, 484 Bartschella, 290 bartschi, Teredo, 467 Basommatophora, 310 Batillaria minima, 153, 155, pl. 19s baiigbi/iani, Anadara, 345 bayeri, Olivella, 18 beaui, Murex, 202, pl. lod, g beaui, Vitrinella, 138 belcheri, Forreria, 200, pl. 24! bcllastriata, Semele, 435, pl. 30J Bellucina, 385 bellum, Prunum, 256, fig. 56d benedicti, Chlamys, 363, 364 benthophila, Hipponix, 166 bequaerti, Murex, 205 Beringiiis, 227 beyerleana, Hyalina, 258 biarigulata, Apolymetis, 434 biangulata, Trigoniocardia, 399 bicarinata, Trichotropis, 168, pl. 24a bicincta, Neptunea, 230 bicolor, Amphissa, 225 bicolor, Isognomon, 358 bicolor, Murex, pl. lom, not in text bidentata, Cylichna, 282, pl. 26q bifida, Janthina, 160 biftircata, Tapes, 411 bifurcatus, Septifer, 353, 354 bilineata, Melanella, pl. 21W, not in text bilirata. Pandora, 471 bimaculata, Heterodonax, 441, pl. 3oi bimaculatus, Megatebennus, 99, pl. 1 8e bimaculatus, Octopus, 488 bimaculoides, Octopus, 489 biplicata, Cylichna, 282 biplicata, Olivella, 247, pl. 12] biscaynensis, Teinostoma, 140 bisecta, Thyasira, 384, fig. 77a bispinosa, Melongena, 234 bispinosa, Peracle, 293, fig. 64f bisulcata, Lithophaga, 357, pl. 28n bisulcata, Torinia, 142, pl. 2ix bisuturalis, Odostomia, 288, fig. 62h