131 
It is sufficient for our purpose, though, to know that, old 
as the species appeared to be, there was enough of it left to 
show that the same genus marked the present creation with 
some of the oldest in the earth; for geologists show that this 
species, m many varieties, is found in the lower oolite. Now, 
it is impossible that any one can mistake the hinge of the 
lrigonia jpedinata (the part from which the shell is named) for 
any other ; it is unique in appearance ; and we have nothing 
that approaches it nearer than the Castalw ambigua, which is 
a different genus. 
The same mysterious circumstance appears to mark the 
chambered shells, better known to some of us by the title 
of Ammonite, which is the name which distinguishes some 
of the varieties.. For a long time this was considered to be 
an extinct species, till the Sjpirula Peronii made its appear- 
<anC ^ ^ ien w h°l e °f that large species of animals — 
0 which from nearly the oldest formation, geologically speak - 
mg, vast numbers of fossil varieties are taken — was united to 
the present species, whose characters could not be mistaken. 
Ihese examples, though only three in number, are as good as 
a thousand for our purpose. 
But I will bring forward another kind of proof to show, that 
other unmistakable signs still exist in the present living 
cieation, to mark them as the same creation as geologists 
suppose came into existence before the six days mentioned in 
(xenesis. I here are three or four species which belong to the 
Moliusca-, such as the Voluta , Fusus , Pyridci , and Bulimus , 
where we have a departure from the usual course of construe* 
tmn in the shell, which, I believe, cannot be explained, and, 
what is singular to notice, it is confined to these varieties. 
1 his alteration is no other than a complete perversion of the 
natural aperture of the shell, so that, while thousands of 
species of univalve shells have the aperture invariably to the 
right, these four varieties have it turned to the left. 
Remarkable as this circumstance is in itself, it is of singular 
importance . that it should be noticed here, for the very same 
peculiarity is to be observed in the fossil varieties of the same 
species, with the exception of Pidimus , which is not found in 
a fossil state. When we find peculiarities which mark the 
living and extinct parts of the creation with such a verv close 
identity as this, I think we may say there is no higher proof 
that the time which marked the commencement of one part 
of creation still existing, was the time that marked the com- 
mencement of that part that has become extinct. 
Haviug thus proved that the identity of the living and 
extinct animals have too close an analogy to admit of their 
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