148 
Dr. Lister, tab. 519, fig. 74, seems to have figured this 
shell in a mutilated state as a Solenites, and better specimens 
at tab. 522, and 523, fig. 77 and 78, as Pinnites, and many 
have called them in common Muscles. I do not know that 
tab. 521, Lister, belongs to this Genus; there is a peculiar 
accuracy in his figure from which I should doubt it, but 
tab. 522 being in all probability a Perna, I have an idea 
that they might have been placed on the same page as 
somewhat related to each other. In some places 1 under 
stand a similar, if not the same species, has been termed the 
Laurel-leaf Muscle: in Oxfordshire, about Shotover Hill, 
I have picked up a curved inside cast which I expect may 
be of this Genus, and I feel an hope that it may be found 
with sufficient of the shell to determine it; we shall then 
know more accurately the form of the muscular impressions, 
which are very large and apparently one in each valve, 
besides a row of little lateral risings within the shell, near 
the front, that seem peculiar to it. Such are found in 
some of the Bedford Clay strata, but I have not seen very 
perfect ones. 
Until Miss Benett brought me specimens, I had not 
much noticed the Genus, not having found any before 
sufficiently fit for attention, but on discovering the rudely 
crenated hinge, it shortly settled a distinction to search for, 
and soon after the learned Woodwardian Professor my 
very kind friend the Rey. John Hailstone, brought for my 
inspection some of the strata of Filey promontory, White- 
nab, near Scarborough, with similar shells, one of which 
had the inner part of the hinge exposed, which was enough 
to show to what it belonged, and the general outline of the 
rest led me to Lister as above, tab. 519, fig. 74, from the 
inscription upon which plate, as Mr. Hailstone observes, 
*€e rupibus juxta Philo, agri Eboracensis,” we'may sup- 
pose they came from the same place. 
