142 
FISHES OF THE CHALK. 
vier* ; and which is considered by that illustrious na- 
turalist as approaching to the Amia calva't of Linne. 
Both the fossils in question differ, however, from 
each other, and from the recent species, in many 
important particulars ; and it is probable that they 
will hereafter be found to be but very remotely 
related, yet, in the present infancy of oryctological 
science, it may be excusable to retain them under 
the same genus, until their characters shall be 
accurately determined by the discovery of more 
illustrative specimens. 
Amia Leivesiensis The length of this ichthy- 
olite generally exceeds eighteen inches, the head 
being equal to one third of the whole ; the width 
is about 4*5 inches. The body is of an elongated 
form, slightly compressed, scaly, and reticulated. 
We have attempted a restored outline. 
AMIA LEWESIENSIS. 
'Fhe scales are of a rhomboidal shape, and beset 
with numerous, small, adpressed sj)ines, producing 
* Fossilcs (le Paris; Reptiles et Poissons, fig. 13. 
■f The Amia calva is a fresliwater fisli, inhabiting tlie rivers of 
Carolina. 
