LAND AND FRESH- WATER SHELLS OF N. A. [PART I, 



Glandina decussata. 



Glandina decussata, Deshayes.— Shell oblong- 

 couic, thin, shining, horn-color ; whirls seven to eight, 

 longitudinally striate, and covered with numerous 

 minute revolving lines; suture slightly crenulated ; 

 aperture oblong, half as long as the shell ; columella 

 curved, truncated, covered with light callus. Length 

 50, diameter IS millimetres. 



Achatina decussata, Deshayes in Fer. (vide Pfeiffer, 



Hon. IV, 644). 

 Glandina truncata, var., Binney, T. M. II, 302, pi. 



ixi, f. 1. 

 Glandina corneola, W. G. Binney, Proc. Phila.> Acad. 



1857, 189 ; T. M. IV, 139. 

 Glandina decussata, Tryon, Am. Journ. Conch. II, 



227, pi. i, f. 7 (1866). 

 Oleacina corneola, Pfeiffer, Mai. Blatt. 1859, 51. 



Western Texas ; Mexico. 



Cat. No. No.ofSp. 



8738 



Locality. 



Devil's River, Tex. 



From whom received. 



Mex. Bound. Surv. 



Fig. 9. 



Glandina albersi, Pfeiffer. — Shell ovate-oblong, thin, with 

 crowded longitudinal strise, pellucid, light flesh-colored ; spire 

 moderate, conical, obtuse ; suture simple ; whirls five and one- 

 half to six, rather convex, more distinctly striated near the 

 suture, the last somewhat longer than the spire, attenuated 

 towards the base ; columella straight, abruptly truncated ; 

 aperture subvertical, wavy-semioval ; peristome simple, acute, 

 its right extremity slightly arcuate. Length 30, breadth 12 ; 

 of aperture 17 long, 5 mill, broad. 



Achatina albersi (Glandina), Pfeiffer, Proc. Zool. Soc. 



1854, 295. 

 Glandina albersi, Carpenter, Maz, Cat. 175 (1S50).— Tryon, 



Am. Journ. Conch. II, 227, pi. i, f. 9 (1866). 

 Oleacina albersi, Pfeiffer, Mon. Hel. IV, 640. 



California. 

 Fig. 9 is drawn from an authentic specimen in Mr. Cuming's 

 collection. 



