TABLE OF CONTENTS. VII 



Page. 



Turbonilla (Pyrgolampros) alaskana 70 



chocolata 70 



painei 71 



keepi 71 



halistrepta 72 



lituyana 73 



oregonenais 73 



Subgenus Pyrgiscus 74 



Key to the species of the subgenus Pyrgiscus , 74 



Turbonilla ( Pyrgiscus) annettae 76 



gracillima 77 



vexativa 77 



obesa 78 



favilla 78 



pequensis 79 



nuttingi 79 



callia ■. 80 



superba 80 



pluto 81 



jewetti 82 



signse 83 



striosa 83 



morchi 84 



aragoni : 85 



recta 85 



weldi 86 



nereia 86 



antestriata 87 



antemunda 88 



flavescens 89 



macbridei 90 



nuttalli 90 



macra 91 



angusta 91 



tenuicula 92 



virgo 93 



marshalli 94 



canfieldi 95 



almo 95 



callipeplum 96 



dina 96 



shimeki 97 



sanctorum 98 



eucosmobasis 98 



halidoma 99 



auricoma 100 



castanea 101 



castanella 102 



indentata 102 



cora 103 



craticulata 104 



ceralva 104 



lepta 105 



