THE 
RIBBAND BULLA. 
Generic Character. 
Animal refembling a Limax or Slug. 
Shell univalve, convoluted. 
Aperture fomewhat ftraitened, oblong, longitudi* 
nal, entire at the bafe. # 
Column oblique and fmooth. 
Specific Character, &c. 
WHITE BULLA, with particoloured double 
bands, and purple truncated column. 
The STRIPED BULLA. 
The PAINTED BULLA. 
This beautiful fhell, Which is juftly confidered as 
one of the molt elegant of the genus, is principally 
found in the rivers of Alia. It varies fometimes in 
its colors, but always retains characters fufficiently 
clear to determine the fpecies. 
