Orbiculata 



Index to the Nautilus 



Orientalis 



orbiculata, Semele 4: 4. 5: 70. 14: 105 

 orbiciilatus. Lampsilis 20: 52 

 orhiculatiis, Unio 1: 50. 8: 116. 18: 57 

 Orbiculoidea Inimilis 28: 94 

 orbiculus. Planorbis 33: 78, 34: 38 

 orbignyanum, Chlorostoma 13: 111 

 orbignyi, Acmaea 23: l.'^l 

 orbignyi, Area 6: 110 

 orbignyi, Pisania 12: 52 

 orbignyi, Pofamolithus 10: 80, 10: 88, 



12: 113 

 orbignyi, Scala 6:111 

 orbignyi, Tritonidea 22: 131 

 Orbis, rotella 4: 25 

 Orcula, 17: 116 

 orcutti, Anisospira 24: 34 

 orcutti, Chlaniydoconcha 11: 91 

 orcutti, Hucalodium 24: 34 

 orcutti, Fusiiius 29: 57 

 orcutti, Macrocallista 32: 24 

 orcutti. Macron 31: 127 

 orcutti, Mitra 33: 103 

 orcutti, Sonorella 18: 95 

 orcuttii. Caecum 16: 41, 22: 135, 33: 63 

 oregona, Acmaea 28: 14 

 oregona, Chrysallida 21: 42 

 oregona, Odostomia 21 : 42 

 oregonense, Argobuccinum 24: 30 

 oregonense, Triton 24: 30 

 oregonense, Tritonium 12: 111-12 

 oregonensis, Ancvlus 9: 137. 13: 65, 



17: 14 

 oregonensis, Anodonta 5: 55, 6: 135, 



9: 102, 12: 111, 28: 43 

 oregonensis, Argobuccinum 24: 29, 31: 



98 

 oregonensis, Catenoscala 22: 80 

 oregonensis, Epiphragmophora 26: 49 

 oregonensis. Helix 26: 49-50 

 oregonensis, Planorbis 9: 52-4, 13: 48, 



19: 94 

 oregonensis, Polygyra 11 : 93 

 oregonensis. Priene 7: 71-2, 9: 39, 10: 



33. 11: 66, 18: 69, 21: 43, 24: 29-30, 



33:24 

 oregonensis, Succinea 3 : 78, 5 : 56, 5 : 92, 



7: 44. 9: 102, 11: 144, 13: 4, 14: 125, 



23: 76, 29: 125, 29: 144, 31: 34 

 oregonensis, Unio 8: 116-17 

 oreta, Helix 10: 104 

 oreta, Xerophila 10: 104 

 Oreohelix. 19: 69 



albofasciata 25: 137 



alpina 26: 89, 29: 48 



alta 26: 144 



avalonensis 19: 71 



barbata 19: 71. 28: 110-12. 29: 30 



Oreohelix berryi 29: 48, 29: 127 

 betheli 26: 144. 27: 39 

 caritiifera 26: 89 



chiricahuana 19: 71 . 27: 51 . 30: 101 

 clappi 18: 53, 19: 71 

 clutei 34: 5 

 compactula 19: 46 

 concentrata 25: 19. 26: 39 

 cooperi 25: 133, 25: 137-8, 26: 9, 



27: 105-6, 27: 38. 27: 52, 29: 



81. 29: 91, 30: 101, 32: 40, 32: 



43, 32: 84, 34: 12 

 corrugata 30: 96 

 cumingsi 34 : 5 

 dakani 27: 38 

 depressa 25: 18-19, 25: 133, 25: 



136. 26: 29-30, 26: 41, 27: 111, 



30: 101. 32: 41. 34: 6 

 elrodi 26: 30 

 eurekensis 30: 96. 31: 94 

 extremitatis 27: 50. 32: 41. 32: 44 

 gabbiana 25: 133, 26: 11. 26: 30, 



27: 38 

 handi. 31: 33. 31: 94 

 havdeni 25: 133, 26: 11, 26: 89, 



26: 144 

 hemphilli 19: 71, 26: 89, 27: 51, 



31:33,31:94 

 hendersoni 26: 11. 26: 29, 27: 38 

 huachucana 19 : 7 1 . 25: 19. 33 : 43 

 idahoensis 27 : 54 

 iowensis 27: 134 

 magnicornu 29: 141 

 maxima 32 : 41 



metcalfei 18: 113. 19: 71, 30: 101 

 minor 26: 10, 27: 38. 27: 53. 29: 



48, 32: 40 

 neomexicana 19 : 71, 34 : 5-6 

 obscura 32: 46 

 obsoleta 33: 70 

 oquirrhensis 34: 141 

 peripherica 27: 53, 30: 96 

 pilsbryiSO: 102 



pygmaea 27: 37, 27: 52, 32: 41 

 socorroensis 19 : 7 1 

 stantoni 19: 95 

 striogsa 18: 54, 19: 47. 20: 132, 



21: 24, 26: 81, 29: 112. 32: 41, 



34: 141 

 tenuistriata 30: 96 

 toolensis 30 : 96 

 utahensis 29: 139 

 vavapai 19: 71, 25: 18, 26: 30, 27: 



51 

 orientalis, Amastra 25: 16 

 orientalis, Lima 7: 75, 9: 71, 16: 43, 

 18: 19. 21: 86 



308 



