Public domain: Species accounts (80 / 1904)

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Species
Babka gymnotrachelus
Bacteriastrum hyalinum
Balanus amphitrite
Balanus glandula
Balanus trigonus
Bangia atropurpurea
Bankia carinata
Bankia fimbriatula
Barentsia benedeni
Barentsia matsushimana
Barentsia ramosa
Beania maxilladentata
Beania mirabilis
Bedeva paivae
Bellamya chinensis
Belzebub hanseni
Bemlos leptocheirus
Beroe cucumis
Beroe ovata
Berthellina citrina
Beryx splendens
Biflustra grandicella
Bispira fabricii
Bispira polyomma
Biuve fulvipunctata
Bivetiella cancellata
Blackfordia virginica
Boccardia polybranchia
Boccardia proboscidea
Boccardia pseudonatrix
Boccardia semibranchiata
Boccardiella hamata
Boccardiella ligerica
Bolinopsis vitrea
Bonamia exitiosa
Bonamia ostreae
Boninia neotethydis
Bonnemaisonia asparagoides
Bonnemaisonia hamifera
Botrylloides anceps
Botrylloides diegensis
Botrylloides giganteus
Botrylloides leachii
Botrylloides niger
Botrylloides violaceus
Botryllus gaiae
Botryllus schlosseri
Botryocladia madagascariensis
Botryocladia wrightii
Botrytella micromora
Botrytella parva
Botrytella sp.
Bougainvillia macloviana
Bougainvillia megas
Bougainvillia muscus
Bougainvillia rugosa
Brachidontes exustus
Brachidontes pharaonis
Brachynotus sexdentatus
Branchiodrilus hortensis
Branchiomma bairdi
Branchiomma boholense
Branchiomma bombyx
Branchiomma luctuosum
Branchiura sowerbyi
Brania arminii
Bregmaceros nectabanus
Bryopsis pennata
Bryopsis plumosa
Bugula avirostris
Bugula neritina
Bugulina calathus
Bugulina flabellata
Bugulina fulva
Bugulina simplex
Bugulina stolonifera
Bulinus contortus
Bulla arabica
Bursatella leachii
Bythocaris cosmetops