pia 308 
14, Nvetta Impressa (?) G. Pl. 3, fig. 3. (No. 32 of collection.) 
tion.—Sub-elliptical; posterior extremity somewhat expanded 5 
surface smooth. A few of the teeth are still visible on the anterior hinge 
margin, but the greater part of the hinge line is obscured. . 
' Locality in longitude 111°, latitude 40°, in slaty bituminous limestone. 
15, Cyrnerea parvuLa. Pl. 3 Sshtes 10 and 10a. (No. 21 of collec- 
~ Compare foxecons angulata ? rie s Geol. Yorkshire, pl. 9, 
Description —Oeate trigonal ; umbones elevated beaks incurved ; sur- 
face mar by regular concentric lines of growth; umbones and beaks — 
with a ae eeage wrinkles, The umbones of this shell are searcely di- 
verging or involute enough to place it in the genus Jsocardia, where it 
‘ Would otherwise very naturally belong. 
Locality in longitude 115°, latitude 43°, in sray argillaceous limestone. 
Two other specimens of the same shell were n 
6. PLEUROTOMARIA UNIANGULATA. PI. 3, Sei, 4and 5. (Nos. 8 and 
32 “a collection. 
_..  Description.—Turbinate ; whorls, about six, gradually enlarging ; con- 
ie vex below, and angular above ; suture plain; surface marked by fine lines 
of ted pbs Aperture round- oval; shell thin, age. 
pecimens are all imperfect, and more or less crushed ; the figures, 
iis are good representations of the fossil. It is readily distinguished 
se lines of growth, resembling a species of Helix, and by the an- 
c Sharacter af the ic mepertert of each whorl. 
fy in | de 111°, latitude 40°, i in a dark slaty bituminous 
mm 
nvm. Pl. 3, figs. 6,6 a. (Nos. 8, 32, ‘and 34, of 
Se. Poe subuilate ; whorls, about ten, mar wed with 
- gtrong ridges, which are again crossed by finer lines i in the direction of the 4 
-whor s. The strong vertical ridges are often obsolete on the last whorl, as 
in fig. 6 a, and the spiral lines much stronger 
This shell is very strongly marked, and its external aspect is sufficient to 
4 distinguish it: it is easily fractured, ‘and, from the nature of the matr ag : 
has been poaese to obtain a -spomaman exhibiting te in ee perfectly. 
. _ Loca lity, same as the:p ; 
‘1s, Seca Pee Pl. 3, figs. 7, 7a. as 28 of collect n.) 
aS? z.—Shell t ) about ine, convex 
2 : Sonica, or sub-globose 5 3; Spire short, ae 
comprisi the greater part of the shell ; 
at-bo ities ; umbilicns moa Surface- 
Pe 
