164 AMERICAN JOURNAL 



Family ORTHALICID^. 



Shell oval or elongated, with elevated spire, much longer than 

 its width ; aperture oval, entire below, the columella sometimes 

 truncate at its termination ; lip either sharp and simple, ex- 

 panded or reflected, with or without teeth (none in North 

 American genera), umbilicus generally covered. 



Suh-families. 



AcHATiNiN^.. Shell oblong; aperture oval, angulated above, 

 rounded below, the lip sharp and not reflected, columella 

 truncate below. Colors generally bright and variegated. 

 Size large. 



ORTHALiciNiE. Shell oblong, thin, imperforate ; apertui e oval, 

 large, angulate above, rounded below, columella arcuate, 

 thickened in the middle. Gaily painted in longitudinal 

 reddish flames. Size moderate. 



BuLiMULlNiE. Shell oblong-turrited, moderately thick ; aper- 

 ture oval, small, outer lip generally expanded or reflected, 

 inner lip reflected, axis perforate, rimate, or sometimes 

 covered. Color white or brownish, sometimes variegated. 

 Size small. 



. ACHATININ/E. 



LIGUUS, Montfort. 



Shell elongate-conical, spire elevated, apex acuminate, im- 

 perforate, solid, whorls 7 — 8, well rounded, the last about one- 

 third of the total length ; aperture semi-oval, margin thin, 

 straight, columella obliquely subtruncate below. Gaily fasciate. 



This is the only genus of the subfamily inhabiiing the 

 Western Continent, and the few species may be regarded as 

 insular in origin, inhabiting principally Cuba, whence the two 

 following have extended to the southern part of the a<ljacent 

 coast of Florida. 



