moved: sufficient, however, of the animal here exists, to show that it is 

 comparable with no known animal. 



Plate XVII. Fig. 15, is the representation of the upper part of an 

 extraordinary fossil; but with where it was found I am totally unac- 

 quainted. Its matrix is a ferruginous lime-stone, in which are discoverable 

 particles of pyrites. It appears to be the dorsal plate of some enormous 

 insect. On this plate regular transverse markings are observable, none 

 of which are to be seen on the abdominal plate. It may perhaps be the 

 remains of some huge insect of the genus Oniscus, or rather Monoculus; 

 'but it differs so much from any known animal, as to render guessing 

 at even its genus presumptuous. 



