|perhaps a large specimen of L. longiscatus|
Striated seeds of a flattened oval form, with parts of coleopterous insects. 
M. Brongniart has enumerated the following fossils as belonging to this formation.
|Cyclostoma elegans antiquum||Limneus inflatus|
|Potamides Lamarckii||Bulimus pygmeus|
|Planorbis rotundatus||– – – – – terebra|
|– – – – – cornu||Pupa Defrancii|
|– – – – – prevostinus||Helix lemani|
|Limneus corneus||– – – Desmarestina|
|– – – – – fabulum||Gyrogonites|
|– – – – – ventricosus|
The last mentioned fossil, to which Lamarck has given the name of Gyrogonites, is a small globular canellated body about the size of a mustard seed. The specimens of the French fossils of this species, in the possession of the Society, are extremely perfect, and correspond exactly to those which I found. They are very numerous
in the freshwater stone at Gurnet point; but they are there
- These were found in some specimens of clay containing also freshwater shells which were dug out of a deep well at Newport. But as no distinct account was kept of the strata passed through, it is not certain to which of the freshwater formations they belong.
- It is proper to observe that the Potamides of Lamarck is a Cerithium. But having considered the cerithia as marine shells, he thought it proper, on finding a species among the freshwater shells, to regard this as of a distinct genus; founding the distinction not on any difference in its form, but on the difference of the water in which it had lived.