422 SW. Ford—New species of Primordial Fossils 
a second ring, but this appearance is due to the damaged condi- 
tion of the head. 
ded limestone east of Troy, N. Y., in the same layer with 
Olenellus asaphoides, Agnostus lobatus, Obolella celata, and 0. 
fe By. gidium along the middle, a plain instead of inbersalane 
No entire specimens of A. paritis have been iar ee 
the two extremities having been referred to each other, a0 is 
doubt rightly, from their similarity of form. The species 
stated to occur near the middle of ‘the formation. 
Troy, March 30th, 1872, 
