172 



BULINUS. 



elongately ovate ; outer lip slightly expanded ; 

 columella thin and slightly twisted. 



Length 14, diam. 6*2 mill. 



Alexandria, Louisiana. 



The above was described from a single 

 broken specimen, and therefore its claims to 

 specific rank must remain somewhat doubtful, 

 although it looks very unlike any other spe- 

 cies with which I am acquainted. 



Extra-limital Species. 

 a. BULINUS AURANTIUS, Carpenter. 

 Habitat. — Mazatlan, Mexico. 



b. BULINUS ELATUS, Gould. 



Plate 7, fig. 14. 



Habitat. — Lower California and Mazatlan, 

 Mexico. 



