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 hcemastoma, v. 



Acephala, 26 



Acer a bullata, xii. 



Achatina, 78, 90 



Achatina achatina, xiii. 



A chatina monetaria, 142 



Achatinella, 64 



Aciculidse, 60 



Acmcea testudinalis , ix. 



Acroloxus, 103 



ActcBon tomatilis, xii. 



A cula, 122 



Adductor muscle, suppression of 



anterior, 33 

 Adductor muscles, 31 

 Admete, 63 



A^ gives punctilucens, 10 

 Molis, 11 

 ^Estivation, 73 

 iEtheriidae, 58 

 Air in chambered Cephalopod 



Shell, 39 

 Allorisma, 46 

 Altitudes at which Mollusca are 



found, 59, 60 

 Amber Snails. See Snccinea. 

 Amicula, 102 

 Ammonites, 99 

 Ammonoidea, 39, 41 

 Amphibola, 52, 96 

 Amphibola nux-avellana, xxvi. 

 Amphineura, 14, 51, 87, 88 



Amphipeplea, 105 



Amphipeplea glutinosa, xiii. 



Ampullaria, 47, 60, 75 



Ampallaria canaliculata, ii. 



Ampullaria globosa, x. 



Ampullariidas, 58, 130 



/4 mpullina sigaretina, x. 



Anademis, 60 



Anatina subrostrata, xx. 



Anatinacea, 87 



Ancylidae, 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, no, 114, 



131 

 Anodonta, Embryo, xxix. 

 Anodonta cygncsa (Swan Mussel), 



74.89 

 Anomia, 48 

 Anomia, Stages in growth, 95, 



xxix. 

 Anomia Achcsus, 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, 

 Aplysiidae, 25 



IO 



145 



