96 CONTRIBUTIONS 
Sowerby mentions two species of the genus Pileopsis, 
from which this is separated, as being found in the Moun- 
tain Limestone ; and Mantell one species from the Lower 
Green Sand of Sussex. These are, I believe, all which 
have been observed in Great Britain. M. Defrance men- 
tions five fossile species of the genus Hipponix. M. Des- 
hayes gives us twelve species of Hipponix in his Tertiary 
Tables—of these, eight are from Paris, nearly the whole 
being found in the Eocene period. It has not, I believe, 
been before noticed in this country. This genus was founded 
by M. Defrance from the examination of the animal brought 
by M.M. Quoy and Gamard, which proved to differ from 
that of the Pileopsis (Lamarck).* Schumacher, in 1817, 
separated the group from the Linnean Patella, and made 
P. ungarica the type of a new genus under the name 
/Amalthea. 
GENUS INFUNDIBULUM. Montfort. 
I. trochiformis. Plate 3. Fig. 76. 
Description. Shell orbicular, obtusely conical, slightly 
tuberculated ; substance of the shell thin ; whorls all ob- 
scure except the first. 
Diam. .3, Height 3-20ths, of an inch. 
Observations. Branders’s figures of Trochus apertus (In. 
tuberculatum, Sowerby), and T. opercularis,t resemble this 
* Manuel de Malacologie, &c. p. 507. 
| Hampshire Fossils, plate 1, fig. 1, 2, 3. 
