THE 
RIBBAND BULLA. 
ete See eee ee oe cod 
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, Ge. 
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 moft elegant of the genus, is principally 
found in the rivers of Afia. It varies fometimes in 
_ its colors, but always retains characters fufficiently 
elear to determine the fpecies. 
