INDEX TO SYSTEMATIC NAMES. 
[Synonyms in italics.] 
Abietinaria abietina 
Abudcfduf saxatilis 
Acanthias amencanus 
Acanthobothrium coronatum 
Acanthobothrium paulum 
Acanthocephala 
Acanthocheilus nidifex 
A canihocottus ceneus 
Acanthocottus groendlandicus 
A canihocottus ododecimspinosus . . 
Acanthocottus variabilis 
Acanthodoris pilosa 
Acartia tonsa 
Achims fasciatus 
Achirus lineatus 
A chirus mollis 
Achrochaete repens 
Acilius fratemus 
Aeineta divisa 
Acineta tuberosa 
Acinetidae 
A cipenser brevirostns 
Acipenser brevirostrum 
Acipenseridae 
A cipenser oxyrhynchus 
Acipenser studio 
Acmaea alveus 
Acmaea testudinalis 
Acmaeidae 
Acroblaste Reinschii 
Acrochaetium Dasyae 
Acrochaetium Daviesii 
Acrochaetium minimum 
Acrochaetium secundatum 
Acrochaetium virgatulum 
Acrocirrus leidyi 
Acteonidae 
Acteon puncto-striatus 
Actinococcus aggregatus 
Actinococcus peltaeformis 
Actinococcus subcutaneus 
Actinophrys sol 
Actinopoda 
Actinozoa 
Adelochorda 
Mgina longicornis 
iEginella longicornis 
Mginella longicornis spinosissima, 
Mlunchthys mannus 
ASolidiadae 
JSolidia papillosa 
Molis Bosloniensis 
Molis despeda 
Molis gymnota 
Mohs papillosa 
Mohs pilata 
Mohs salmonacea 
Aiquorea albida 
Mquorea tenuis 
ASquoreidae 
Avschna 
iEtea anguina 
tage. 
iEteidae 597 
Agalma elegans 575 
Agalmidae 575 
Agamonema capsularia 592 
Agamonema papilligerus 592 
Agardhiella tenera 825 
Agarum Tumeri 8io> 
Aglantha conica 574 
Aglantha digitalis 574 
Aglaophenia arborea 574 
Aglaophenia minuta 573 
Aglaophenia struthionoides 574 
Aglauridae 574 
Ahnf eldtia plicata 823 
Alaria esculenta 810 
Albula vulpes 741 
Albulidae 741 
Alca torda 775 
Alcidae 775 
Alcyoniidae 576 
Alcyonidiidae 605 
Alcyonidium gelatinosum 606 
Alcyonidium hirsutum 606 
Alcyonidium hispidum 605 
Alcyonidium my tili 606 
Alcyonidium parasiticum 6o9 
Alcyonidium ramosum 605 
Alcyonidium rubrum 606 
Alcyonidium verrilli 605 
Alcyonium carneum 576 
Alderia harvardiensis 706 
Alebioii glaber 642 
Alebion glabrum ; 642 
Alebion gracile 642 
Alebion gracilis 642 
Alectis ciliaris 752 
Alectryonidae 708 
Alexia myosotis 706 
Algae 797 
Aligena elevata 689 
Alle alle 776 
Allorchestes littoralis 648 
Alopias vulpes 736 
Alopiidae 736 
Alosa menhaden 742 
Alosa sapidissima 742 
Alteutha depressa 639 
A lutera cuspicauda 762 
Alutera monoceros 762 
Alutera schoepfii 762 
Amage pusilla 628 
Amarcccium constellatum 733 
Amaroecium pallidum 732 
Amarcecium pellcidum 732 
A maroecium stellatum 733 
Amaroucium glabrum 733 
Amaroucium pallidum 732 
Amaroucium pellucidum 732 
Amaroucium pellucidum constellatum 733 
Amaroucium stellatum 733 
Amathia dichotoma 6c6 
Amraochares artifex 626 
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