32 
hair. The back is remarkable for a flat space between 
the beaks, not generally observable in this genus. The 
surface has several large longitudinal furrows, without 
regularity, and excepting the line close striae, is smooth. 
The shell is very thick, and rough within. 
Collected by Mr. Farey, in the Wayboards between 
the Limestone, under the Coal, at Llangaveni in Angle- 
sea : it is accompanied by small Trilobites imbedded in 
a kind of Shale. 
PRODUCTUS latissimus. 
TAB. CCCXXX. 
Spec. Char. Transversely oblong, depressed, 
coarsely striated ; beak much incurved ; 
hinge line very long. 
TP 
A he long hinge line, partly concealed by the beak, and 
the coarse pattern upon the surface, distinguish this from 
the last : the shell also appears to be thinner, and the 
space between the beaks is much narrower. 
Found in a Cherty Limestone, at Tyddmawr Farm in 
Anglesea, by Mr. Farey. The shell is in many parts 
gone, and its place supplied by Silex in numerous small 
drops, each surrounded by several irregular rings of the 
same material, a form of Silex not rare among fossil 
remains of shells composed of laminae strongly impreg- 
nated with gluten, as Ostrea Pectens, See. in the green 
sand and other formations, and lately met with, forming 
hollow tuberose masses that fall out of decomposing 
Limestone in Devonshire. 
The upper figure is from a neat little specimen brought 
from Puffin’s Island, N. of Anglesea, by Samuel Hawkes 
jun. Esq. The shell upon it is entire. 
