OF CONCHOLOGY. 227 



mella strongly arched. Pale fawn color, sometimes greenish, 

 generally flecked with distant pale spots. 



Length 70, diam. 25 mill. 



Texas and Mexico. 



6. Glandina decussata, Deshayes. 



Plate 1, figure 7. 



Oblong-conic, thin, shining; spire moderate, obtuse, sutures 

 crenulated ; whorls 7-8, somewhat convex ; body two-thirds 

 the total length, narrowly convex ; aperture oblong, one-half 

 the total length, columella curved, covered with a light callus. 

 Light horn color. 



Length 50, diam. 18 mill. 



Texas, Mexico. 



Narrower, more cylindrical than No. 5. 



* 

 * * 



Mexican species. 

 Not spirally striate. 



7. Glandina turris, Pfeiffer. 



Plate 1, figure 8. 



Oblong turrited, thin, diaphanous; spire elevated, obtuse, 

 suture crenulate ; whorls 7 ; body narrow, equalling three- 

 sevenths of the total length; aperture semi-oval, columella verti- 

 cal, abruptly truncate before reaching the base of the aperture. 

 Corneous. 



Length 43, diam. 15 mill. 



Mazatlan. 



8. Glandina Albersi, Pfeiffer. 



Plate 1, figure 9. 



Ovate-oblong, thin, pellucid; spire moderate, conical, apex 

 obtuse, suture scarcely crenulate ; whorls 5|-6, slightly con- 

 vex, the last scarcely longer than the spire, attenuated at base ; 

 aperture sub-vertical, sinuately semi-oval, labrum slightly 

 arcuate, columella perpendicular. Light corneous. 



Length 80, diam. 12 mill. 



Mazatlan. 



