128 The Shell-Collector’s Handbook. 
callosity. (= Pupa bigranata, Rossm, Icongr. ix., x.,. 
p. 25, fig. 645.) 
v. edentula (Moq.): Shell edentulous. 
v. albina (Menke): Shell whitish, unicolor. 
v. brevis (Laud); Shell very short, robust, callosity 
thick, peristome white. 
