114 EOCENE MOLLUSCA. 
mella is furnished with three distinct folds, of which the middle one is the largest and 
the posterior one the smallest; the outer lip is slightly reflected, but not so as to cover 
the umbilicus. 
This species, in its general form, much resembles C. pyramidalis (Sow.), but the 
whorls are not so convex, and the sutures are nearer to each other, so that the spire 
is shorter and the aperture longer and narrower. The columella also presents three 
folds, instead of the two which distinguish the crag species. 
The shell figured is, I believe, unique; it is one of the many valuable additions 
made to our Eocene fauna by the “ English Natural History Society,” under the able 
direction of Mr. Charlesworth. It forms part of the collection in the Museum of the 
Philosophical Society of York, who have kindly allowed me the use of it for 
description. 
Stze.—Axis, 7-10ths of an inch nearly. 
Locality High Cliff, Hampshire. 
Genus 17th. PepipEs.*  <Adanson. 
PrpipEs, Adanson, 1757. 
— Féruss., 1819; Menke, 1828; Desh., 1832; Beck, 1837; Bronn, 
1838; Gray, 1839; Swain., 1840; G. Sow., jun., 1842; 
Desh., 1843. 
— (sec. B), Blainville, 1825. 
Potyponta (sp.), Fischer. 
Burimus (sp.), Bruguiére. 
TorRNATELLA (sp.), Lamarck. 
AURICULA (sp.), Reeve. 
Gen. Char.—Shell small, thick, sub-globose or oval; spire pointed, not much 
elevated: aperture sub-ovate or linear; outer lip thm, sharp, with one or two folds 
within; columella with two folds; one large fold on the penultimate whorl. 
This genus was proposed by Adanson on a small marine shell from the coast of 
Senegal ; and, although it was confounded by Bruguiére with Bu/imus, and by Lamarck 
with Yornatella, it appears to have been generally adopted. The animal, which 
Adanson describes as very small in comparison with the shell, is furnished with two 
filiform tentacles, oculated at their inner bases; the muzzle is rounded and notched in 
front; as in I/elampus and Limnea; the foot is elliptical and divided into lobes sepa- 
rated by a deep transverse furrow; the anterior lobe is transverse, wider than long, 
and rounded in front; the posterior one longer than wide, and somewhat narrowed 
* Etym. Adanson gave the name Pzetin (quasi pieton, a walker,) to this genus on account of the singular 
way in which the animal walks, and the Latin name, Pedipes, imposed by him, has probably reference to 
this peculiarity. 
