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AGATE BULLA. 
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Generic Character. 
Animal refembling a Limax or Sluw. 
.V/W/ univalve, convoluted. 
Aperture fomewhat ilraitencd, oblong, longitu¬ 
dinal, entire at the bafe. 
Column oblique and fmooth. 
Stecific Character, £? r . 
Ovate, pointed, wide-mouthed BULLA, with 
broad fal'ciie and truncated column. 
Far. 
With blue variegations and crimfon mouth. 
La Come de pourpre. 
Knorr. vergn. 4. p. 44. pi. 24. f. 1. 
A purple-mouthed variety of the Bulla achatina 
has already been reprefented in the prefent work ; 
but the beautiful kind here figured is much lefs fre¬ 
quent, and is highly remarkable for the elegance 
and delicacy of its colors. 
