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. 
88) 
