13S 



ACIIATININiE. 



mustelina, Migh. 

 ovata, Newc. 

 planospira, Pfeiff. 

 porcellana, Newc. 

 Redfieldi, Newc. 

 rosea, Swains. 

 rugosa, Newc. 

 semicarinata, Newc. 

 sordida, Newc. 



Sowerbyana, Pfeiff. 

 Swainsoni, Pfeiff. 

 Swifti, Migh. 

 treniolata, Pfeiff. 

 Tappaniana, C. B. Adams. 

 terebra, Newc. 

 variabilis, Newc. 

 vidua, Pfeiff. 

 viridans, Migh. 



Sub-gen. laminella, Pfeiffer. 



Sbell conico-turreted ; spire attenuated, apex obtuse, whorls 

 srnootb, tbe last ventricose ; columella twisted, with a strong, 

 anterior, lamellar plait; outer lip acute, simple. 



acuta, Newc. 

 affinis, Newc. 

 albolabris, Neivc. 

 assimilis, Newc. 

 brevis, Pfeiff. 

 citrina, Migh. 

 cornea, Neivc. 

 crassilabrum, Newc. 

 cylindrica, Newc. 

 flavescens, Newc. 

 fusca, Newc. 

 fusiformis, Pfeiff. 

 gravida, Ferus. 

 lineolata, Newc. 

 marmorata, Gould. 

 melanosis, Newc. 

 modesta, C. B. Adams. 



mucronata, Newc. 

 nubilosa, Migh. 

 obscura, Newc. 

 picta, Migh. 

 porpbyrea, Newc. 

 pupoidea, Newc. 

 rubens, Goidd. 

 rudis, Pfeiff. 

 sanguinea, Newc. 

 soror, Newc. 

 spirizona, Ferus. 

 straminea, Peeve. 

 suffusa, Reeve. 

 textilis, Ferus. 

 turritella, Ferus. 

 variegata, Pfeiff'. 

 venusta, Migh. 



Sub-gen. newcombia, Pfeiffer. 



Shell turreted, beterospiral ; whorls transversely Urate or 

 rugosely plicate ; columella with the truncature indistinct ; outer 

 lip simple, acute. 



aptycha, Pfeiff. cerealis, Gould. 



