144 
tracted in the middle by the thickened lip and the plaits 
upon the columella : the strie are at a small distance from 
each other, and hollow without interruption. 
So great is the resemblance of this to Lamarck’s A. 
ringens that had he not mentioned the strie within the 
lip, I might have overlooked the distinguishing character, 
although the French shell is double the size—a minute 
comparison also shews that A. ringens has rather a 
longer and more acute spire. A. turgida is the produce 
of the blue Clay of Highgate in which it sometimes ad-~ 
heres to the masses of indurated marl, &c. 
AURICULA simulata. 
TAB. CLXIII.—Figs. 5 tos. 
Spec. Cuar. Oval, pointed, with close transversé 
laterally toothed costa ; whorls slightly ventri- 
cose ; mouth angular above ; outer lip sharp, 
striated within; two broad plaits upon the 
columella. 
Syn. Bulla simulata. Brander 61. 
Neaarty three-fourths of an inch long. There is a si- 
nus in the lower part of the outer lip before it reaches the 
columella: the two plaits upon the columella are very 
prominent and laterally compressed ; they are more or 
less oblique in different individuals. The coste are 
small, flattish, and almost close to each other : the teeth 
upon the sides are minute, those in one rib being placed 
opposite those in the next form a series of elongated ovate 
hollows, as is represented at fig. 5. 
Several of my friends have presented me with this from 
Barton Cliff. I possess also various specimens from 
Highgate ; in one of these the outer lip is thickened and 
erenulated within, but as the shell had been broken just 
at the part, and has grown again, that may have arisen 
from the accident. Brander certainly meant the same 
shell, but his figure is too long: the name he has given it 
implies its resemblance in form to some species of Buc- 
cinum,. 
