89 



or sub-quadrantalj the whole head bordered anterior- 

 ly with a punctured fillet: body distinctly three lobed, 

 middle lobe sub-cylindric, and not so broad as the 



side lobes." 



* 



NUTTAINIA SPARSA. Eaton. Cast No. 35. 



Fillet nearly straight in front of the middle lobe of 

 the head, punctures of the fillet scattered irregularly, 

 without any alternating ridgesj head compressed, co- 

 vered with scattered punctures, having its side lobes 

 much smaller than the middle one; middle lobe with 

 straight sides, giving it somewhat the form of a pa- 

 rallelogram. 



Found in third grauwacke,* or grit slate in Coey- 

 mans, sixteen miles south-west of Albany. I have 

 the head of one before me two and a half inches 

 broad, and one and a half long. The whole of the 

 animal must have been six or seven inches in length. 



The above account is copied from the " Text 

 Book." Mr. Eaton was kind enough to lend me the 

 only specimen of this curious fossil remain, which 

 has yet been found; from which his description was 

 taken, and of which our cast is an exact copy. His 

 generic characters do not in our opinion at all ap- 

 ply to this fragment. Nothing but the head of this 



* In a manuscript note, Professor Eaton states that the third 

 grauwacke, or grit slate of Coeymans, " alternates with the un- 

 derlaying cherty lime rock." This opinion some of our geologi- 

 cal friends, familiar with the formation at Coeymans, and with 

 the Professor's nomenclature of rocks, have called in question. 

 H 2 



