( 59 ) 
7. Poramuprs. (1) Brongn. 
Notch less apparent, No gutter. Salt-water marshes, 
right lip dilated. Pl. 10, or the brackish waters 
fig. 18. of the mouths of rivers. 
8. Rosrevtaris. (2) Lam. 
Fusiform ; a second Marine. ‘i 
canal, ascending along V. Animal, p. 70. 
the spire, formed by the 
outer lip and by the con- 
tinuation of the columella. 
Pl. 10, fig. 16. 
B. Oval, sub-conical, or sub-globulous. 
9. Bucetnum. (3) Lam. 
Oval or elongated ; Columella convex, na- Marine. 
mouth notched below ; ked. VY. Animal, p. 69. 
lips simple : operculum 
cartilaginous. Pl. 10, fig. 
Tia : 
10. Dotium. Lam. 
Ventricose ; sub-globu-  — Columella twisted or — Marine. f 
lous ; outer lip undulated, sharp at the base. VY. Animal, p. 69. 
notched below. PI. 40, 
fig. 22. 
11. Harpa. (4) Lam. 
Oval or gibbous ; with Columella smooth. Marine. 
longitudinal or oblique Generally in) warm 
sharp ribs, the last form- climates. 
ing a callous pad at the V. Animal, p. 69. 
lip; mouth oblong, sim- 
ple, notched below. PI. 
11, fig. 1. 
(1) This Genus is founded on the habits of the animal, rather than on the im- 
portance of the character of the shell. Fossil species are found in formations pre- 
senting only terrestrial and fresh-water shells. P. Lamarckii, pl 4, fig. 6, is found 
in the opaque silex which covers the sand at Longjumeau ; in the forests of Mont- 
morency ; above St. Cloud; mixed with Lymnzi, Planorbes, and stalks of reeds in 
the Limestone, east of Aurillac, in Cantal; in the compact limestone beds (with 
the Helix Cocquii, pl. 4, fig. 20) , at Nonette, near Issois, in Puy de Dome. \t re- 
sembles the Cerithium radula, figured by Lister as a fresh-water shell; and, ina 
lesser degree, the Bulimus auritus of Bruguiere, from the interior of Africa. 
(2) Foss. in the London Clay; at Courtagnon; St. Germain en Laye; Parnes. 
(3) Foss. at Grignon. 
(4) Although the Harp are by no means rare in the seas of warm climates, only 
two species have as yet been found in the fossil state, and those in the coarse Shelly 
Limestone at Grignon and Hauteville. 
