149 
Figs. 1 and 2 are from Osraington near Weymouth they 
were found in a mixed stratum with a muddy debris,, and 
the shells seem as if they had suffered but little change by 
their general aspect^ as if indeed they had only lain in mud 
and x dirt so as to begin to lose a fresh appearance^ such aa 
might be expected in a few months., but as they are found 
upon examination to be changed into crystallized Car* 
bonate of Iron? they are certainly preserved under other 
circumstances. 
Fig. S shows part of an hinge from Whitenab, Fig. 4 
is a specimen from the same place. 
