...Georgia in Vermont, trilobites which were described by Mr. Hall in 1859 as belonging to the genus Olenus, a recognized primordial type; he has since erected...sub-Silurian group. We have however shown that the palseontological evidence afforded by this formation gives no support to such a view. To Mr. Emmons...

...as the greatly developed representatives of the Potsdam and Calciferous groups (with part of that of the Chazy), and the true base of the Silurian system." "The Quebec group with its underlying shales," this author adds (and he expresses the opinion of Sir WE Logan), "is no other than the Tnconic system...

...as the greatly developed representatives of the Potsdam and Caleilerous groups (into part of that of Chazy), and the true base of the Silurian system." "The Quebec group, with its underlying shales," this author adds (and he expresses the opimon of Sir W. Logan), "is no other than the Taconic system...

...as the greatly developed representative of the Potsdam and Calciferous groups (with part of that of Chazy), and the true base of the Silurian system.' ' The Quebec group with its underlying shales,' this author adds (and he expresses the opinion of Sir W. Logan,) ' is no other than the Taconic system...

...as the greatly developed representative of the Potsdam and Calciferous groups (with part of that of Chazy), and the true base of the Silurian system.' ' The Quebec group with its underlying shales,' this author adds (and he expresses the opinion of Sir W. Logan,) ' is no other than the Taconic system...

...as the greatly-developed representatives of the Potsdam and Calciferous groups (with part of that of the Chazy), and the true base of the Silurian system." " The Quebec group, with its underlying shales," this author adds, "is no other than the Taconic system of Emmons ; " which is thus shown to be the...

...as the greatly-developed representatives of the Potsdam and Calciferous groups (with part of that of the Chazy), and the true base of the Silurian system." " The Quebec group, with its underlying shales," this author adds, "is no other than the Taconic system of Emmons ; " which is thus shown to be the...

...as the greitly-developed representatives of the Potsdam and Calciferous groups (with part of that of the Chazy), and the true base of the Silurian system." " The Quebec group, with its underlying shales," this author adds, " is no other than the Taconic system of Emmons;" which is thus shown to be the natural...

...greatly developed representatives of the Potsdam and Calciterous groirps (with port of that of Chozy), and the true base of the Silurian system The Quebec group, with its underlying shales," this author adds (and h'e expresses tlio opinion of Sir AV. Logan), " is no other than the Taconic...

...as the greatly developed representatives of the Potsdam and Calcifurous groups (with part of that of Chazy), and the true base of the Silurian system." "The Quebec group, with its underlying shales," this author adds (and he expresses the opinion of Sir W. Logan), •' is no other, than the Taconic...