21 
and the lobe not continuing the upper part of the outer lip : 
I have therefore designated it as a new and extraordinary 
species. It was found towards the surface of the Highgate 
clay stratum, where it is more or less mixed with the 
greenish sand. This shell bears some relation to N. epi- 
glottina of Lamarcke, but differs in the general form, as well 
as in the form of the mouth and left lip, according to his 
figure. There being only these little distinctions between 
these species, I call this Nation similis. I have a cast about 
the size of the shell below, from Bognor, by favour of W. 
Borrer, Esq. that I judge indicates this species. 
NATICA depressa. 
TAB. V .- — Lower figures. 
Ampullar ia depressa ? Lamarcke, Ann* du 
Mns. t. 5, p. 32. t. 8, pi. 61, f. 3. 
Spec. Char. Nearly globose., subumbilicafed ; upper 
part and side of each wborle flattened^ so as to 
appear nearly square ; columella depressed be- 
neath ; mouth angular at the upper part. 
Spiral volutions about six, flattened above; the large 
lower whorle loses that flatness at the upper part of the 
mouth; the right lip is undulated by the lateral depression, 
which reaches to the middle of the lower volution, which 
then becomes convex. The mouth is most acute at the 
upper part; the inner or left lip spreading a little, nearly in. 
a straight line, gives it an almost lunate form. Umbilicus 
oblong, not very deep. 
I have this shell only by favour of the Rev. P. Lathhury, 
from Woodbridge, Suffolk. It is whitish and chalky. 
