195 
The figure of Aldrovandus has been copied by Bonanni, Gualtieri, 
Klein, and others. Lister has given a copy from Aldrovandus, Hist. 
Conch. T. 414, Fig. 258 ; and Baron Born has given a correct figure 
from a shell in the cabinet of Vienna, Mus. Cces. Find, test T. i. Fig. 8. 
Aldrovandus relates that the shell which he described was found m 
the Mediterranean, on the coast of Spain. 
This shell is exceedingly rare : M. Menard observes, that it is not 
in any of the Parisian collections, not even in the Museum of Natural 
History ; and that he knew of but one in the possession of M. Pech, 
whose cabinet was sold to the Emperor of Austria. The particular 
characters of this shell demanding its being placed in a new and dis- 
tinct genus, were fully noticed by Baron Born, who says Ob extre- 
mitatem utramque hiantem Solenibus affinis, a quibus dente exseito 
crassissimo differt.” Mus. Cces. p. 20. 
M. Pech, on comparing the characters of his recent shell with those 
of the fossil one, was of opinion that, in general, they agreed; and 
particularly that the hinge was the same. But he found that the 
recent shell was wider and less tumid, in pioportion to its size, than 
the fossil one, and that it gaped at both ends, but less at the posterior 
than at the anterior part ; whilst, in the fossil shell, the opening in 
the posterior part was hardly discoverable. From this comparison, 
M. Menard concludes, that the recent and fossil shells are of distinct 
species : the propriety of which conclusion will at once be seen, on a 
view of the figure given by Born, and of that given by M. Menard. 
The species to which the recent shell belonged he named Panopea Hl- 
drovandi; and that to which the fossil shell was referable, Panopea 
Faujas. 
Among the fossil shells which I had purchased from the collection of 
Mr. Strange, was a valve, which I had valued from its resemblance to 
the shell of Aldrovandus ; but of the habitat of which I could obtain 
no other information than the word Maryland, which was written on 
its inner surface. On reading M. Menard’s account of the Parmese 
