1906.] 



NATURAL SCIENCES OF PHILADELPHIA. 



617 



Vertigo 530 



binneyana - 147 



milium - 147 



oscariana - 147 



ovata - 147 



rugosula -534, 557 



Vitrea -- - 153 



Vitrea aiolacogyra .....533, 561 



binneyana -- 152 



daUiana 151,152 



d. roemeri 124, 151, 151, 152 



hammonis 151, 152, 533, 562 



indentata 150, 533, 562 



i. umbilicata 124, 150, 562 



milium ...152, 153 



m. meridionalis 152 



m. pugetensis 153 



multidentata 533,560 



petrophila 151, 533, 561 



p. pentadelphia 562 



sculptilis 150 



signifieans 533,560 



simpsoni 533, 560, 561 



wheatleyi - 151 



Vitrina 530 



alaskana 153, 153 



pfeifferi 153 



Vitrinizonites 530 



Voluta petrosa 59 



sayana 66 



Volutilithes 52-76 



abyssicola 75 



haleanus 69 



limopsis 56, 58, 59, 69-72, 74, 75 



Volutilithes petrosus 52-76 



rugata 57 



rugatus 57, 58, 71, 74 



sayana 66, 71, 72, 74 



symmetrica 68 



Waiteina 473 



Xiphidion 416 



fa.sciatima 416 



saltans 416 



strictum 416 



Xiphorhamphus abbreviatus— .460, ^61 



brachycephalus 4^0 



falcirostris AS2 



hepsetus ^60 



heterolepis 4^2 



Xiphostoma hujeta 466 



maculatum 463 



tsedo 4^3 



Xystroplites longimanus 520 



Zapata 39,40 



Zonites acerra 658 



brittsi 558 



demissa 558 



dallianus 152 



singleyanus 150 



Zonitidse 149, 530, 532, 557 



Zonitoides 153,530 



arborea 150, 152, 553, 560, 562 



minuscula 149,560 



m. alachuana 149, 560 



m. neomexicana 149 



nummus 124, 150 



singlevana 150,534 



Zostera '. 96,104 



