OF CONCHOLOGY. 1G9 



3. Liostracus Dormani, W. G. Binney. 



riate 13, figure 8. 



Ovately turrited, perforate, smooth ; spire elongate, acute, 

 suture impressed ; whorls 6, slightly convex, with minute 

 revolving lines, last whorl convex, with a very obtuse carina on 

 the periphery ; aperture semi-oval, columella perpendicular. 

 Shining white, Avith several revolving rows of perpendicular, 

 reddish-brown patches. 



Length 29, diam. 12 mill. 



St. Augustine, Florida. 



MESEMBRINUS, Albers. 

 1. Mesembrinus multilineatus, Say. 



Plate 13, figures U, 12. 



Ovate-conic, smooth ; spire elevated, suture distinct, but not 

 deep ; whorls 7, slightly convex, the last three-fifths of the total 

 length; aperture small, oval, columella perpendicular, perfora- 

 tion partly covered. Yellowish-white, with chestnut longitudi- 

 nal lines, a dark infra-sutural line, and a black apex, umbilical 

 area and lip. 



Length 17, diam. 8 mill. 



East Florida. 



The markings are not unlike those of M, virgulatus, Fer., of 

 West Indies. 



2. Mesembrinus Humboldti, Reeve. 



Plate 13, figure 13. 



Ovately turrited, thin, smooth, narrowly umbilicated ; spire 

 elongate, acute ; whorls 7, somewhat convex, the last three-fifths 

 of the total length ; aperture oblique, oval, lip sharp, not re- 

 flected, columellar margin dilated and appressed. Wiiite or 

 yellowish, with narroAv, interrupted brown bands, sometimes not 

 banded. 



Length 31, diam. 15 mill. 



Cinaloa, North-western Mexico. 



This species is described from Peru, and the identity of the 

 Mexican specimens m.iy be regarded as questionable. 



