ORTHALICUS. 215 



Achatina truncata, Pfr. See Glandina. 



Achatina vanuxemensis, Lea. See Glandina. 



Achatina rosea, Deshayes. See Glandina truncata. 



Achatina striata, DeKay, is Glandina truncata. See Terr. Moll. IV, 139. 



Achatina subula, Pfr. See Stenogyra. 



Achatina texasiana, Pfr. See Glandina. 



Achatina australis, Villa, N. Am., Disp. 19. 



Achatina pellucida, Pfr. See Blauneria. 



Achatina gracillima, Pfr. See Stenogyra. 



Achatina Jlammigera, Say (ed. Binxey, 29) = Orthalicus undalus. 



Achatina Jlammigera, Ferussac. See Terr. Moll. IV, 138. 



ORTHALICUS, Beck. 



Shell imperforate, ovate or oblong, ornamented with often 



articulated fillets, apex obtuse, last whirl inflated ; columella 



filiformly thickened, sometimes callous, 



, ,. , , , Fig. 3G7. 

 arcuate, obliquely subtruncate at base ; , 



aperture longitudinal, oval. 



Jaw heavy, semilunar, composed of 



16-22 semitriangular, free, imbricated 



, , 1 1 ,1 1 /. .T Ja.vr of Orthnlicus zebra. 



plates, crenulated on the external free side. 



The lingual membrane, as described under Orthalicinse, on 

 page 212, has uniform, short, bicuspid teeth. As stated in the 

 foot-note to the same page, the lingual membrane of Orthalicus 

 undafus does not agree with this. 



Lingual membrane large, broad, covered with large, numerous, 

 almost equal papillae arranged in numerous, almost straight 

 series, and furnished at the middle of their base with oblong, 

 subquadrate, dilated, hooked denticles. 



The genus Orthalicus does not properly belong to the fauna 

 of North America. It is common in the TVest India islands, 

 from whence specimens have become introduced to the Florida 

 Keys. It is also found at Mazatlan, on the Pacific coast. 



Spbgenus orthalicus, Beck, s. str. 

 Shell imperforate, ovate or oblong-conic, thin, striated, de- 

 cussated with curling lines, and ornamented with usually articu- 



