VI TABLE OF CONTENTS. 



Page. 



Turbonilla (Chemnitzia) paramcea 37 



houseri 



aculeus 



nmricatoides 



kelseyi 



raymondi 



Subgenus Strioturbonilla 



Key to the species of the subgenus Strioturbonilla 



Turbonilla (Strioturbonilla) stephanogyra 



panamensis 



button! 



vancouverensis 



asser 



niexicana 



attrita 



nicholsi 



torquata 



stylina 



calvini 



carpenteri 



simpsoni 



profundicola 



galianoi 



humerosa 



c. b. adamsi 



serrse 



aresta 



pazana 



galapagensis 



undata 



affinis 



phanea 1 



imperialis 



smithsoni 



gracilior 



Subgenus Ptycheulimella 



Key to the species of the subgenus Ptycheulimella 



Turbonilla (Ptycheulimella) obsoleta 



abreojensis 



Subgenus Pyrgolampros 



Key to the species of the subgenus Pyrgolampros 



Turbonilla (Pyrgolampros) victoriana 



gibbosa 



ridgwayi 



valdezi 



newcombei 



taylori 



lowei 



halibrecta 



gouldi 



aurantia 



pedroana 



halia 



lyaUi 



berryi 



