New Species of Trilohite, 



^3 



the lobes, covering only the upper half of the body, the lower 

 half being a smooth surface to its termination. The lobes (if 



clinches 



they may be so called) do not extend lower than the transverse 

 lines, and their division is so unequal that the middle lobe is 



1 1 almost four times the width 

 of those of the side. This 

 animal has probably had 

 the power, like the Dudley 

 Trilobites, of coiling itself 

 up, by making the tail meet 

 the mouth ; and, from the 

 curvature at the lateral ter- 

 mination of the transverse 

 lines, which give the appearance of side lobes, this is not an 

 improbable supposition. The head, which, perhaps, is the 

 most peculiar 

 part, occupies 

 nearly a third 

 of the animal. 

 The eyes are/ 

 very promi-i 

 nently marked, 

 exhibiting the 

 palpebrae, or 

 eyelids, dis- 

 tinctly and par- 

 tially open, surrounded by an orbital jtnargin, with a sort of 

 notch in the superior part. From each canthus, or corner of 

 the eye, there is a kind of suture extending to the under 



