INDEX 
*,* References to the Plates are given in roman numerals. 
AByssaL Mollusca, 55 
Acanthina, 69 
Acanthina imbricata, xi, 
Acanthoceras Rhotomagense, xxii. 
Acanthochites, 102 
Acanthopleura spinosus, ix. 
Acavus hemastoma, v. 
Acephala, 26 
Aceva bullata, xii. 
Achatina, 78, 90 
Achatina achatina, xiii. 
Achatina monetaria, 142 
Achatinella, 64 
Aciculidz, 60 
Acmeaa testudinalis, ix. 
Acroloxus, 103 
Actaon tornatilis, xii, 
Acula, 122 
Adductor muscle, suppression of 
anterior, 33 
Adductor muscles, 31 
Admete, 63 
ZEgives punctilucens, 10 
fBolis, 11 
Estivation, 73 
fEtheriide, 58 
Air in chambered Cephalopod 
Shell, 39 
Allorisma, 46 
Altitudes at which Mollusca are 
found, 59, 60 
Amber Snails, 
Amicula, 102 
Ammonites, 99 
Ammonoidea, 39, 41 
Amphibola, 52, 96 
Amphibola nux-avellana, xxvi. 
Amphineura, 14, 51, 87, 88 
See Succinea, 
Amphipeplea, 105 
Amphipeplea glutinosa, xiii. 
Ampullaria, 47, 60, 75 
Ampullaria canaliculata, ii, 
Ampullaria globosa, x. 
Ampullariidz, 58, 130 
Ampullina sigaretina, x. 
Anadenus, 60 
Anatina subvostrata, xx. 
Anatinacea, 87 
Ancylidz, 58 
Ancyloceras spinigerum, xxii. 
Ancylus (Freshwater Limpet), 53, 
58, 65, 85, 90, 103 
Ancylus fluviatilis, xiii. 
Animals feeding on Mollusca, 
76-78 
Annulus, 38 
Anodonta, 5, 53, 74, 92, II0, 114, 
131 
Anodonta, Embryo, xxix. 
Anodonta cygnea (Swan Mussel), 
74, 89 
Anomia, 48 
Anomia, Stages in growth, 95, 
XX1X, 
Anomia Acheaus, xvii. 
Anostoma, 98 
Anostoma globulosum, viii., xiii. 
Anterior canal, 20 
Aperture of Shell, 19 
Apex, 19 
Aplacophora, 14, 15, 127 
Aplecta hypnorum, 59 
Aplustrum aplustre, xii. 
Aplysia (Sea Hare), 25, 55, 143 
Aplysia depilans, xii. 
Aplysiidz, 25 
19 145 
