OP CONCHOLOGT. 225 



MONOGRAPH 



OP THE 



TERRESTRIAL MOLLUSCA 



OF THE 



XJniteci Stsbtes. 



Family OLEACINIDiE, H. and A. Adams. 



A single genus of this family inhabits the United States. 



GLANDINA, Schumacher. 



Shell oblong-oval, more or less elongated, corneous, shining; 

 spire elevated ; body whorl attenuated a little at base, imper- 

 forate ; columella thin, arcuated, abruptly truncated at base ; 

 month long, rather narrow, lip sharp. 



Animal, mouth capable of a proboscidiform protrusion, 

 without a jaw. 



The species of Olandina present few prominent distinctive 

 characters, and are particularly liable to variation in size and 

 form. As already mentioned, our species are southern in 

 distribution, and occur only upon the sea-coast or in its near 

 vicinity. 



* Transversely striate, without revolving strise. 

 t Oval, cylindrical, spire moderate. 



1. Glandina truncata, Say. 



Plate 1, figures 1, 3. 



Ovate-fusiform, heavy, striate ; spire rather elevated ; apex 

 obtuse, suture well marked, crenulate ; whorls 6-7, moderately 

 convex; body three-fourths the total length, sub-cylindrical; 

 aperture ovatc-lunate, narrow, half the total length, labium 

 sharp, rounded below to meet the perpendicular, truncate 

 columella. Fawn color tinted with rose, deeper within the 

 aperture. 



Length 65, diam. 25 millimetres. 



South Carolina to Florida. 



