OF CONCHOLOGY. 173 



2. Mormus pilula, W. G. Binney. 



Plate 14, figure 7. 



Shell globular, thin, inflated, umbilicated ; spire short-conical, 

 suture well impressed ; aperture rounded, lip thin, columellar 

 margin broadly reflected. White, with two brown revolving 

 bands. 



Long. 12, lat. 9 mill. 



Lower California. 



SCUTALUS, Albers. 



1. Scutalus proteus, Broderip, 

 Plate 14, figure 8. 



This is a Peruvian species, of which a number of young speci- 

 mens have been collected in Lower California. It may not be 

 more than an adventitious inhabitant of that peninsula. 



2. Scutalus dealbatus, Say. 



Plate 14, figure 9. 



Shell ovate-conical, thin, ventricose ; whorls 7, striate, with 

 growth lines which are more apparent on the spire, the last 

 whorl subglobose ; aperture ovate, lip thin, the columellar mar- 

 gin reflected, umbilicus narrow. White, with interrupted oblique 

 longitudinal grey or yellow streaks. •*. 



Length 18, diam. 11 mill. 



North Carolina, Alabama, Texas, Missouri, Arkansas. 



A very abundant species, which will probably be found to 

 inhabit all the far southern States. 



3. Scutalus Xantusi, W. G. Binney. 

 Plate 14, figure 11. 



Shell ovate-oblong, longitudinally striate, with minute re- 

 volving lines ; spire elevated, suture impressed ; whorls 5|, 

 slightly convex ; aperture ovate, lip simple, columella arched, 

 parietal wall covered by a slight callus. White (bleached?). 

 Length 21, diam. 8 mill. 



Lower California. 

 12 



