44 Say on Shells, &e. 
of the opposite valve, slightly more depressed ; two or three 
ae conspicuous incremental lines are continued so as to 
ross the projecting face of the siphunculated hinge margin, 
pervect is but slightly prominent. 
Cabinet of the Acad. Nat. Sciences. 
This handsome species was found in the New-J ersey Al- 
juvium by Mr. S. Wetherill of Burlington. The folds are 
somewhat similar to those of Plicatula plicata. It resem- 
bles the T’. crumena of Sowerby, in the form of its folds, and 
in their extending to the beak, but the middle of the front 
is very slightly elevated, with but two folds, instead of three 
as in the crumena, the sides also have two or more folds, in- 
stead of four or more, and the beak is not very prominent. 
Belemnites. 
These are often found in the New-Jersey Alluvium, 
sometimes entirely changed into chrystalized blue iron earth. 
(Hydrate of iron, of Judge Gorey “J 
= Ammonite. 
A species of this genus was Faun in the abovethétisioned 
locality by Mr. Wetherill. It approaches nearest to 4. ele- 
gans of Sowerby, but I have not seen a specimen sufficiently 
entire to determine its species with exactness. 
Dentalium. 
A species has been found in 1 New-Jersey, near Mulliger 
hill, by Mr. A. Jessup, which seems to approach nearest to 
D. sulcatus, but as it has only about sixteen equal coste it is 
more than probably a new species. . 
Turritella. 
A species of this genus was found by the same gentleman 
with the preceding, in plenty. It approaches very closely 
to the conoidea of Sowerby and is mgst probaly the same 
pes 
I yn seen several redintrigrate fossils from the New- 
Jersey Alluvium, amongst which I may mention a Cucullaea, 
