INDEX. 



Abalone, 320 



Aoanthobdella, 235 



Acantliocepliali, 213 



Acanthoraetrida, 11 



Acephala, 252 



Aoera, 31)2 



Aceate, 170 



Acetabula, 360 



Acalephse, 72 



Achatiua, SIG 



Acliatininic, 316 



Acliatinella, 318 



AgiciiIidiE, 340 



Acineta, 47 



Acmaja, 321 



Acmaiidse, 321, 345 



Acraspeda, 94 



Acthiai'ia, 48 « 



Aotiiiia, 113 



Actinoida, 113 



Actinolopliiis, 32 



Actinospliaermm, 14 



Actinometra, 143 



Aotinomma, 9 



Aotinomonas, 22 



Aotiiiophrys, 13 



Aotinotrocha, 213 



Acthiozoa, 112 



Admete, 337 



Aeropese, 173 



Mta, 241 



iEtidfE, 241 



Agalma, 98 



AgalinidiE, 98 



Agalmopsif, 102 



Agamogeiiesis, xlviii 



Agassizia, 17(j 



Agate shells, 310 



Agelaciiuites, 139, 140 



Aglaophenia, 89 



Alasinodon, 271 



Albertia, 203 



Aloyonaria, 115 



Alcyonidlidje, 241 



Alcyonidium, 239, 241 



Alcyonoida, 121 



Aleotryonia, 259 



Alexia, 303 



Alternation of generations, xlviii, 



97 

 Amaura, 346 

 Amblypneustes, 170 

 Ambulacra, 135 

 Ammodiscus, 18, 21 

 Ammonite, 368 

 Ammonitidae, 368 

 Amnicola, 339 

 Amoeba, 



Ampliiaster, xlv, 159 

 Amphibolidje, 305 

 Amphldotus, 173 

 Amphileptus, 28,40 

 Amphitrite, 226 

 Amphiura, 150 

 Ampulla, 137 

 Ampulls, 52 



Ampullaria, 344 



AmpullariidSE, 344 



Analogy, xvi 



AnanoliytinEB, 174 



Anatiuidse, 2U2 



Anculotus, 342 



Ancylinte, 307 



Anoyloceras, 308 



Ancylus, 308 



Anoyromouas, 33 



AnguilKila, 207 



Animalcules, trumpet, 42 



Animal psychology, xxxi 



Animals, iii 



Anisopleura, 294 



Annelida, 218 



Anodonta, 271 



Anomia, 200 



Anopla, 210 



Anoplophrya, 41 



Anops, 330 



Antedon, 141, 142 



Antliophysa, 33 



Anthropology, i 



Antipatharia, 121 



Antipatlies, 121 



Anursea, 30 



Aperture, 287 



Aphroditidse, 230 



Apiocrinidaa, 142 



Aplysia, 302 



Aplysiidae, 302 



Aplysinaj, 05 



Apoda, 179 



Apolemia, 103 



ApolemiadjE, 103 

 Aporrhais, 350 

 Apsilus, 203 

 Apple shells, 344 

 Apple snails, 344 

 Arachnactis, IIG 

 Arbacia, 167 

 Arbaciidae, 167 

 Area, 2o8 

 Aroadas, 268 

 Archaic types, xviii 

 Archaster, 158 

 Archenteron, xi 

 Aroheteuthis, 377 

 Archiannelida, 219 

 Arenicola, 227 

 Argina, 268 

 Argonauta, 379 

 Aricia, 349 

 Ariolimax, 319 

 Arion, 319 

 Arioninae, 318, 319 

 Aristotle's lantern, 165 

 Articulata, 247 

 Ascaltis, 02 

 Ascaridje, 212 

 Asoaris, 212 

 Asoones, 62 

 Asiphonida, 257 

 Aspergillum, 283 

 Aspidochirotae, 1S2 



Asplanchnidae, 205 

 Asthenosoma, 168 

 Asthmatos, 39 

 Astarte, 275 

 Astasia, 36 

 Astasidaa, 30 

 Asteracanthion, 160 

 Asterias, 100 

 Asteridse, 160 

 Asterina, 159 

 Asterinidae, 158 

 Asteroidea, 152 

 Asteropsis, 158 

 Astraea, 120 

 Astrangia, 120 

 Astroohema, 152 

 Astroclon, 152 

 Astrogonium, 159 

 Astromma, 10 

 Astropecten, 158 

 Astropectinidae, 157 

 Astrophytidae, 152 

 Astrophyton, 152 

 Astropyga, 107 

 Astrorhiza, 18 

 Astrosiga, 35 

 Astylospongia, 71 

 AteleorinuB, 144 

 Athorybia, 101 

 Athorybia larva, 101 

 Atlanta, 355 

 Atlantidse, 355 

 Atoll, 130 

 Atrocha, 203 

 Atrophy, xv 

 Auditory organ, xxx 

 Aureli^, 90 

 Aureliidae, 90 

 Auricula, 30f! 

 Auriculidae, 305 

 Autolytus, 229 

 Avioula, 202 

 Avicularia, 238 

 Aviculidae, 2u2 

 Azygobranohia, 322 



Balauoglossus, 231 

 Balatro, 203 



Barbed-headed worms, 213 

 Basommatophora, 305 

 Bath-sponge, 51, 64 

 Bathycrinus, 140 

 Bear's-paw clam, 273 

 Beche-de-mer, 178 

 Bola, 337 

 Belemnite, 373 

 Belemnitidae, 373 

 Bellerophon, 355 

 Beroe, 112 

 Bioellaridae, 241 

 Bioosoeca, 34 

 Binneya, 315 

 Bipinnaria, 155 

 Bittium, 348 

 Bivalve molluscs, 252 

 Black helmet, 352 

 381 



