THE 
AGATE BULLA. 
BEEEEEEEEEE ES ESET PIRE 
GENERIC CHARACTER. 
Animal vefembling a Limax or Slug. 
She// univalve, convoluted. 
Aperture fomewhat ftraitened, oblong, longitu- 
dinal, entire at the bafe. 
Column oblique and {mooth. 
SPECIFIC CHARACTER, Cc. 
Ovate, pointed, wide-mouthed BULLA, with 
broad fafcicze and truncated column. 
Var. 
With blue variegations and crimfon mouth, 
La Corne de pourpre. 
Knorr. vergn. 4. p» 44. pl. 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. 
