32 
mene macrophthalma, first given by Professor 
Brongniart, not only to this fossil, but to 
another, which differs essentially from it. He 
has given in his admirable work on this sub¬ 
ject good figures of both animals, but his spe¬ 
cific description refers only to plate 1, fig. 4, 
A. B. He observes, “ that the species is 
remarkable by the prolongation of the ante¬ 
rior portion of the buckler in the form of a 
snout, and that its middle lobe or front, is 
marked on its sides by three oblique plicce or 
wrinkles, like those on the C. tristani This 
description applies very well to some reliques 
found in the .Dudley rock, which we have 
examined, but it is perfectly obvious that the 
calymene bufo, which has a rounded front, 
and is entirely destitute of plicae or wrinkles, 
cannot be included in it. We therefore 
took the liberty in our little work of calling 
by the name of calymene bufo the fossil re¬ 
presented on his first plate at fig. 5, and which 
is so common in the United States; and of 
restricting the C. macrophthalma to the ani- 
