70 
AMMONITES Conybeari. 
TAB. CXXXI. 
Spec. Cuar. Depressed, carinated, volutions many, 
exposed, with obtuse radii; keel prominent, 
entire ; back flattish, angular ; aperture oblong. 
V orvrions 8 or 9 ; the radii even, or rather most ele- 
vated in the middle of each volution, and lost before 
they quite reach the angles of the back: keel large and 
prominent, with a slightly concave space on each side 
of it. 
This species is rather remarkably variable in size, 
from 2 to 18 inches and more in width, and always hav- 
ing about 8 whorls, generally continuing very perfect to 
asmall center. It is from near Bath. The composition 
it is preserved in varies much, like that of most of the 
shells of the Lias strata in general, being Carbonate of 
Lime more or less crystallized, Lron Pyrites, or mere casts 
of earthy Limestone, or a mixture of the whole, and 
shewing the foliated divisions, or nearly plain. 
I feel a pleasure in distinguishing this by the name it 
bears, after two able Geologists, the learned friends and 
companions of the Rev. Mr. Buckland, whose zeal de- 
serves to be remembered by posterity. This and the 
following species are generally companions in the same 
stratum, and are occasionally impressed with each 
others type. 
