185 
MY A lata. 
TAB, LXXXL 
Spec, Char. Ovate^ depressed; anterior side acu- 
minated and truncated^ slightly gaping*. 
Length about twodhirds the width; the beak is sharp, 
but not very prominent; the hinged-tooth large. 
This is a great curiosity at present, and is highly 
satisfactory as determining the species to be different from 
the recent Mya arenaria of Linnaeus, which is readily seen 
by comparison, at least from that understood to be Mya 
arenaria in England. The craig shells of Norfolk and 
Suffolk are remarkable for the little change they have 
undergone, as well as their near resemblance to some of our 
recent species; and although a few are not easily to be 
distinguished from them, and others are mutilated, and 
until seen in perfection cannot be distinguished, yet many 
are not at all related to any recent species known or observed 
in any other stratum. Thus it is pleasant to meet with 
sufficient specimens. Jf the present be the same as those 
from Bramerton near Norwich (of which we have only 
seen small pieces which were generally considered as Mya 
arenaria) they must be different species; Mya arenaria is 
not truncated, and they differ sufficiently from Mya trim- 
eata not to be that species, and as it is a broad shell, I have 
called it lata. It seems to be between Mya arenaria and 
truncata ; but there are other truncated species among the 
Fossils, and others might come between the same two, else 
intermedia might have been a good name. 
