7. Potamides. (i)Brongn. 



Notch less apparent, 

 right lip dilated. PI. 10, 

 fig. 18. 



C 39 ) 



No gutter. 



Salt-water marshes, 

 or the brackish waters 

 of the mouths of rivers. 



8. Rostellaria. (2) Lam. 



Fusiform ; a second 

 canal, ascending along 

 the spire, formed by the 

 outer lip and by the con- 

 tinuation of the columella. 

 PI. 10, fig. 16. 



B. Owl j sub-conicalj or sub-globulous, 



9. Buccinum. (3) Lam. 



Oval or elongated; Columella convex, na- 

 mouth notched below ; ked. 

 lips simple : operculum 

 cartilaginous. PI. 10, fig. 

 21. 



10. Dolium. Lam. 



Yentricose • sub-globu- Columella twisted or 

 lous ; outer lip undulated, sharp at the base, 

 notched below. PI. 10, 

 fig. 22. 



II. Harpa. (4) Lam. 



Oval or gibbous ; with 

 longitudinal or oblique 

 sharp ribs, the last form- 

 ing a callous pad at the 

 lip ; mouth oblong, sim- 

 ple, notched below, PI. 

 11, fig. 1. 



Columella smooth. 



Marine. 



V. Animal, p. 70. 



Marine. 



V. Animal, p. 69. 



Marine. 



V. Animal, p. 69. 



Marine. 



Generally in warm 

 climates. 



V. Animal, p. 69. 



(1) This Genus is founded on the habils 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. Lamarchii , pi 4, fig. 6 7 is found 

 in the opaque silex which covers the sand at Longjumeau ; in the forests of Mont- 

 morency ; above St. Cloud ; mixed with Lymnaii, Planorbes, and stalks of reeds in 

 the Limestone, east of Aurillac, in Cantal; in the compact limestone beds (with 

 the Helix Cocquii, pi. 4, fig. 20) , at Nonette, near Issois, in Pay dc Dome. It re- 

 sembles the Cerithium radula, figured by Lister as a fresh-water shell ; and, in a 

 lesser degree, the Bulimus auritus of Bruguiere, from the interior of Africa. 



(2) Foss. in the London Clay ; at Courtagnon ; St. Germain en Lay c; Panics. 



(3) Foss. at Grignon. 



(4) Although the Harpac are by no means rare in the seas of warm climates, only 

 two species have as yet been found in the fossil stale, and those in the coarse Shelly 

 Limestone at Grignon and Hautcvillc, 



