INDEX 



abbreviala, Gaslrocopta armifera . ... 97 



ahrupta, Gastrocopta contracta 98 



aenea 



aenea, Strobilops 114 



micromphala, Strobilops 115 



spiralis, Strobilops 115 



Strobilops 114 



Strobilops aenea 114 



aMnis 



Gastrocopta armijera 96 



Strobilops 113 



agreste, Deroceras 130 



Agriolimax 128 



alba, Polygyra multilineata 51 



albolabris 



albolabris, Polygyra 19, 49 



alleni, Polygyra 19, 49 



dentata, Polygyra 19, 49 



Helix 19 



Polygyra 4, 6, 9, 19, 20, 49 



Polygyra albolabris 19, 49 



algonquinensis, Polygyra multilineata 51 



alleni, Polygyra albolabris 19, 49 



alternata 



alternata, Anguispira 84 



.4 nguispira 83, 84 



Anguispira alternata 84 



carinata, Anguispira 85 



Pyramidula 84 



allicola. Columella 109 



.4 nguispira 22, 84 



alternata 83, 84 



alternata alternata 84 



alternata carinata 85 



kochi 22, 85 



Angular lamellae 93 



-4 ngustula 107 



anthonyi. Discus cronkhitei 86 



Aperture of shell 4, 17, 18 



Apex of shell 18 



Apparatus, collecting 13 



appressa, Polygyra 54 



arboreus, Zonitoides 23, 78 



armifera 



abbreviata, Gastrocopta 97 



affinis, Gastrocopta 96 



armifera, Gastrocopta 96 



Gastrocopta 95 



Gastrocopta armifera 96 



similis, Gastrocopta 96 



aurea, Succinea 148 



avara 



avara, Succinea 124 



Succinea 121, 124 



Succinea avara 124 



wardiana, Succinea 124 



B 



Back of snail 3 



Baker, F. C 14 



Baker, H. B 25 



Basal fold 93, 110 



Basommatophora 37, 135 



bidentata, Polygyra tridentata 45 



Bifidaria 96 



penlodon floridana 147 



BiNNEY, Amos 25 



BiNNEY, William G. . . .- 25 



Binomial system 19 



Bland, Thomas 25 



Blanks, field data 12 



Body 



snail 4 



whorl 18 



Breathing orifice 4 



BULIMULIDAE 63 



Bulimulus 63 



dealbatus 63 



Cabinets, shell 14, 16 



Calkins, W. W 26 



campestris, Deroceras 130 



capsella 



Paravitrea 73 



Vitrea 73 



carinata, Anguispira alternata 85 



carolinensis 132 



carolinianus, Philomycus 131 



Cartilage of mouth 5,6 



Carychium 135 



exiguum 135, 136 



exile 136 



cava, Polygyra fraterna 61 



cellar ia, 



Vitrea 140 



Zonites 140 



cellar ium, Oxychilus 139 



cellarius, Oxychilus 140 



cher sinus 



chersinus, Euconulus 76 



Euconulus 76 



Euconulus chersinus 76 



Polygvratus, Euconulus 76 



Chitin 6 



Circinaria 92 



Clapp, George H 25 



Class 20 



Classification of snails 17 



clausa 



Helix 57 



Polygyra 57 



climeana, Gastrocopta contracta 98 



Cochlicopa 120 



lubrica 120 



COCHLICOPIDAE 120 



Collar, mantle 4 



Collecting 



apparatus 13 



snails 11 



Collectors of Illinois land snails. ... 25 



Color of shells 18 



Columella 109 



alticola 109 



edentula 109 



Columellar lamella 93, 110 



concavum, Haplotrema 6, 7, 91, 92 



concordialis, Succinea 123 



contracta 



abrupta, Gastrocopta 98 



[161] 



