INDEX TO ILLUSTRATIONS 



In this index, boldface type is used to refer to plate numbers; figure num- 

 bers are in regular type. 



Acrorbis petricola 72:1-10 

 Afroplanorbis adowensis 71:10-12; 81:2 



pjcifjed 71:7-9 



sudanicus 81 : 3 

 Anisopsis calculus 81:10 



loryi 81:11 

 Anisus leiicostomus 7:1-5; 47:15; 

 77:16-18 



septemgyratus 7:6 



spirorbis 6:5,7,13; 47:13,16; 50:25; 

 67:6; 77:20-22 



vortex 6:1-4, 6; 47:12, 14; 77:19 

 Armiger crista 18:6-11; 47 : 20, 21 ; 48: 15; 



50:20; 69:6; 76:6 

 Australorbis ajitigueyisis 139:26-30 



bahie7isis 138:13-27 



blauneri 138:11-12 



glabratus 9:4-10; 45:1,7-11; 48:9,10; 

 50:13; 68:5; 77:29-31; 140:5-18 



glabratus christopherensis 139:19-25; 

 140:19-21 



glabratus olivaceus 139:32-36; 140:1-4 



glabratus refidgens 139:31 



guadeloupensis 137 : 35, 36 



immunis 137 : 28-34 



lugubris 138:1-10 



paysanduensis 139:1-5 



tenagophilus 139:6-18 



Baihyomphalus contortus 3:5-10; 46:19, 



20; 48:8; 68:1; 77:23-25 

 Biomphalaria smithi 81:4 

 Bulinus contortus 75:4-6 



Carinifex jacksonen.sis 35:2-9; 49:17,18; 

 65:4; 115:8-13 

 ncwberryi 78:23,24; 112:9-11; 113:1- 



23; 114:14-16 

 ncwberryi malleata 113:24-30 

 ncwberryi minor 78:25,26; 114:19-24 

 ncwberryi subrotunda 114:25-28 

 occidentalis 112:12-21; 114:17 

 ponsonbyi 34:1-12; 35:1; 45:2.12; 

 48:3; 49:19; 67:8; 114:1-13,18 

 Choanomphalus maacki 81:7 

 schrenckii 81 :9 

 valvatoides 81 :8 

 Costorbis strauchianus 76:3 



Drcpanotrema ahcnum 124:21-28 

 anatinum 9:1-3; 68:3; 79:16-18; 



124:1-13, 30 

 castaneo)iitens 126 :l-5 

 cimcx 127:1-3,7,8,16; 128:17-22 

 cimex pistiae 127:13-15 

 cultratiim 76:10; 78:17-19 

 cultratum anitense 126:17-19 



cultratum duenasiamim 127:9-12 

 cultratum labrosum 128:6-10 

 cultratum panuco 128:1-5 

 depressissimum 127 : 17-19 

 hetcropleurus 129 : 37-42 

 hoffmani 10:1-9; 46:14, 15; 50:26; 



68:4; 78:14-16; 126:6-12 

 kermatoide 126:13-16 

 lucidum. 11:1-7; 46:16; 48:11; 50:27; 



68:2; 78:11-13; 124:29, 31, 32; 



125:1-17 

 mellcum 125:18-21 

 parapseide 124:14-20 

 peninsularis 128:23-25 

 sumichrasti 128:11-16 



Gyraulus albns 14:1-11; 48:13; 50:28; 

 68:9; 70:13; 77:1-3; 136:1-3 

 borcalis 126:32-39 

 circumstriatus 17:1-5; 47:2,6; 50:22; 



52 : 14-16 

 convexiusculus 19:1-3; 47:8,17 

 deflectus 136:13-21, 23-26 

 dcflectus obliquus 16:1-15; 47:3,10; 



50:18; 69:2; 136:22,27-31 

 hirsutus 15:1-7; 47:18,19; 50:17; 



69:1; 70:5; 136:4-12 

 latestomus 19:4-9; 47:11 

 parvus 17:6-12; 47:1,5; 48:14; 50:16; 



69:3; 77:4-6 

 similaris 18:1-5; 47:9; 69:4 

 vermicularis 15:8-10; 47:4,7; 50:19; 



69:5 



Helicorbis umbilicalis 78:5-7 

 Helisoma afflne 141:8-11 

 ammon 89:25-27; 94:14, 15, 17, 20-28; 



95:1-16 

 anceps 22:10,12; 23:1-4, 7-11; 44:1,7; 



48:17; 49:1; 53:1-3; 80:1-6; 



82:1-19, 26, 30; 84:1; 96:23-30 

 anceps a7iticostianum 96:18-22 

 anceps aroostookensc 83:27-29 

 anceps bartschi 83:19-22 

 anceps cahni 54:3; 85:14-16 

 anceps corrugatum 82:31 

 anceps idahoense 84:26-28; 101:11, 12 

 anceps jordanensc 84:6-8 

 anceps latch fordi 22:1; 23:5, 6; 44:8; 



54:4; 85:5-7 

 anceps minnesotense 82:27-29 

 anceps percarinatum 22:2-4, 11; 54:1; 



84:2; 85:8-13 

 anceps politum 83:16-18 

 anceps portagensc 84:3; 85:1-4 

 anceps royalense 54:2; 84:4, 9, 13-17 

 anceps rushi 84:10-12 



527 



