166 



INDEX 



Spire 18 



stenolrema, Polygyra 58 



Striatura 77 



milium 77 



milium meridionalis 77 



milium milium 77 



Strobila Ill 



Strobilops Ill 



aenea 114 



aenea aenea 114 



aenea micromphala 115 



aenea spiralis 115 



affinis 113 



labyrinthica 1 10, 111 



labyrinthica labyrinthica Ill 



labyrinthica parietalis 112 



labyrinthica virgo 112 



STROBILOPSIDAE 22. 110 



Strode. W. S 26 



Stylommatophora 37. 40 



Sticcinea 11, 121 



aiirea 148 



avara 121. 124 



avara avara 124 



avara wardiana 124 



concordialis 123 



grosvenorii 124, 148 



higginsi 148 



iUinoisensis 126 



nultalliana 147 



ovalis 122 



oralis optima 122 



ovalis ovalis 122 



retusa 125 



retusa decampi 126 



retusa iUinoisensis 126 



retusa magister 125 



retusa peoriensis 126 



retusa retusa 125 



salleana 127 



vermeta 124 



SUCCINEIDAE 121 



Suture 18 



System, binomial 19 



T 



Tail 4 



tappaniana, Gastrocopta 101 



Tebennophorus 133 



Teeth 6, 7, 18 



Tentacle 3, 4 



Testacella 



europaea 142 



haliotidea 143 



haliotoidea 143 



thyroides, Polygyra 56 



thvroidus, Polygyra 56 



Trays 14, 16 



Trematoda 25 



tridentata 



bidentata, Polygyra 45 



edenlilabris, Polygyra 45 



frisoni. Polygyra 17, 18. 45 



Polygyra 7. 45 



Polygyra tridentata 45 



tridentata, Polygyra 45 



unidentata, Polygyra 45 



Vertigo 106 



u 



Ulffers. H. a 2( 



Umbilicus \i 



unidentata, Polygyra tridentata 4.* 



Upper palatal fold 9. 



Valle>s 



\'allonia 



costata 116. 117. 



excentrica 



Parvula 



Pulchella 



VALLONIIDAE 



ventricosa. Vertigo '. 



Ventridens 



demissus 



gularis 82. 



intertextus 82. 



ligerus 



vermeta, Suuinea 



I 'ertigo 



elatior 



gouldii 103. 



loessensis '. 



milium 



morsei 19. 



ovata 



simplex 



tridentata 



ventricosa 



Vials, shell 14 



virgo, Strobilops labyrinthica 



viridulus, Vitrea 



Vitrea 



capsella 



cellaria 



hammonis 



viridulus 



Vitrina limpida 



vulgatus, Mesomphix perlaevis 



w 



Walker. Bryant 



Wall, parietal 



wardiana, Succinea avara 1 



'ivheallevi, Retinella 



Whorl 



body 



Wolf, John 



zaleta, Polygyra 



Zonites 



cellaria 



fuliginosa 



laevigata 



ZONITIDAE 22. 



Zonitoides 23, 



arboreuS 23, 



limatulus 



minusculus 



nitidus 



Zonitoids 13, 



