266 AMERICAN JOURNAL 



Mexican Species. 



Pseudohyalina Mazatlanica, Pfeiflfer. 



Plate 4, figure 59. 

 Depressed, umbilicate, costato-striate, corneous ; whorls 4, 

 somewhat convex, the spire slightly raised ; last whorl narrow, 

 scarcely descending at the aperture; umbilicus equalling J of 

 the diameter; aperture oblique, Innately rounded, its margins 

 approaching. 



Diam. 2-3, altitude 1 mill. 



Mazatlan, Mexico. 



