159 
OLIVA. Bruguiere. 
Gen. Char. A subcylindrical univalve shell, with 
a notched base ; whorls of the spire separated 
by a canal ; columella obliquely striated. 
Of this genus there are but few species ; the recent 
ones are inhabitants of Tropical seas ; they have gene- 
rally very narrow longitudinal mouths, whence the form 
of the shells is more or less cylindrical. This genus is 
distinguished from Aneilla by the plaits upon the co- 
lumella, and the naked spire, whose turns are separated 
by a canal extending from the upper angle of the mouth : 
the right lip is thickened, and a corugated varix is often 
formed around the base of the columella : the spire is 
generally short but acute, and the surface of the shell 
polished and destitute of epidermis, because it is enve« 
loped by the mantle of the animal. 
OLIVA Branderi. 
TAB. CCLXXXVIII . — Upper Figure . 
Spec. Char. Ovate, pointed, smooth ; spire pro- 
minent ; last whorl convex ; mouth oblong. 
Syn. Voluta Ispidula. Brander , /. 72, excl. syn, 
A regularly ovate shell, with a slightly varicose and 
notched base : the right lip is thickened, and the left 
plaited near the base. Length almost double the width. 
Dr. Solander, in Brander’s Hampshire Fossils, has 
erred in considering this to be Voluta Ispidula of Linneus,* 
its form is totally different from any of the numerous 
varieties of that shell. It appears to be a rare Hamp- 
shire shell, and unknown in France. Miss Beminster 
favoured me with the specimen figured. 
