62 



INDEX 



climeana, Gastrocopla 98 



contracin, Gastrocopla 98 



Gastrocopla 97 



Gastrocopla contracta 98 



urticaria, Gastrocopla 101 



nlala, Vallonia 116, 117, 119 



bounties of Illinois 27 



'onkhilei 



anthonyi. Discus 86 



Discus 86 



'yplomphala, Retinella 71, 149 



uprea, Omphalina 66 



ipreus, Mesomphix 64, 66 



D 



ealbalus, Bulimulus 63 



ecampi, Succinea retusa 126 



emissus, Ventridens 82 



entata, Polygyra albdabris 19, 49 



)enticle 18 



labial 18 



parietal 18 



peristomal 18 



>eroceras 128 



agreste 130 



campestris 130 



gracile 129 



Hscus 86 



cronkhitei 86 



cronkhitei anthonyi 86 



Patulus 87 



orfeuilliana , Polygyra 44 



orsalis, PaUifera 132 



E 



;conomic importance of snails 23 



ientata, Polygyra inflecla 47 



ientilabris, Polygra tridenlala 45 



ientula 



Columella 109 



Pupa 109 



ientulum, Sphyradium 109 



'asciata, Polygyra profunda 48 



ggs, snail 9 



alior. Vertigo 106 



eclrina, Retinella 69 



evata, Polygyra 55 



LLOBIIDAE 135 



XDODONTIDAE 22, 83 



pidermis 17 



piphragm 12 



■uconulus 75 



cher sinus 76 



chersinus chersinus 76 



cher sinus polygyratus 76 



fulvus 75 



■iropaen, Testacella 142 



tcenlrica, Vallonia 118 



dguum, Carychium 135, 136 



die, Carychium 136 



toleta, Polygyra 50 



ye 3, 4 



peduncles 3,4 



F 



illax, Polygyra 46 



amily 20, 22 



eeding habits 5 



eelers 3 



Ferriss hoe 13 



Ferriss, J. H 26 



Field data blanks 12 



flavus, Limax 23. 142 



floridana 



Bifidaria pentodon 147 



Gastrocopla pentodon 147 



Fold 



basal 93. 110 



lower palatal 93 



palatal 1 10 



upper palatal 93 



Folds of shell 18 



Food of snails 5, 7 



Foot 4 



Form of shells 17, 18 



Foster, Thural Dale 19 



fosteri 



PaUifera 133 



Polygyra 19, 54 



raterna 



cava, Polygyra 61 



fraterna, Polygyra 61 



Polygyra 61 



Polygyra fraterna 61 



fraudulenta, Polygyra 46 



friabilis, Mesomphix 67 



frisoni, Polygyra tridenlala ... 17, 18, 45 



fuliginosa, Zonites 66 



fulvus, Euconulus 75 



G 



Gastrocopla 34, 94 



armifera 95 



armifera abhreviata 97 



armifera affinis 96 



armifera armifera 96 



armifera similis 96 



contracta 94, 97 



contracta abrupla 98 



contracta climeana 98 



contracta contracta 98 



corticaria 101 



holzingeri 19, 99 



pentodon 100 



pentodon floridana 147 



pentodon gracilis 100 



pentodon pentodon 100 



procera 102 



procera mcclungi 102 



procera procera 102 



tappaniana 101 



Gastrodonta 81 



gularis 82. 150 



interna 150 



inlerlexta 82, 150 



Gastropoda 20, 33, 37 



Genus 19. 20 



Geological history, snails in 30 



Glacial periods 30 



Gould, Augustus A 25 



gouldii. Vertigo 103, 147 



gracile, Deroceras 129 



gracilis, Gastrocopla pentodon 100 



grosvenorii, Succinea 124, 148 



Growth lines, shell 18 



gularis 



Gastrodonta 82, 150 



Ventridens 82, 150 



