THE 
AGATE BULLA. 
^44 4 4 4 * 1 * 
Generic Character. 
Aninial refembling a Limax or Slug. 
Shell univalve, convoluted. 
Aperture fomewhat ftraitened, oblong, longitu¬ 
dinal, entire at the bafe. 
Column oblique and fmooth. 
Specific Character, &c. 
Ovate, pointed, wide-mouthed BULLA, with 
broad fafciae, crimfon mouth, and truncated 
column. 
The AGATE BULLA. 
The CRIMSON-MOUTHED BULLA. 
This moft elegant fliell is a native of America and 
the Weft Indian iflands. It varies confiderably in 
point of color, being fomecimes of a dufky brown, 
with deeper variegations; at other times ornamented 
with the beautiful hues repcefented on the annexed 
plate. This is commonly called the purple-mouthed 
variety. 
