202 REPORT OF THE AMERICAN COMMITTEE. 
has probably its representatives, and yon can find species that 
will be limited to the phases and stages. The longer the vertical 
range of the division, the more comprehensive the assemblage of 
trilobites will be that will fit it. 
I shonld say that the name should be derived from the usual 
geographical locality, and the applications of paleontological terms 
be subordinate, partly because the classification will be compara- 
tively new — partly because the paleontologists must be able to 
extend the range of species by new discoveries. Even the 
Ammonite is proved to be Cenozoic, yet there is scarcely any 
form of life that is more characteristic of the Mesozoic. 
I think that Barrande has made the most thorough classifica- 
tion of the Lower Paleozoic rocks, and should be inclined to 
follow him. He it is that set the English geologists right and 
also the Americans twenty-five years since. 
Dr. T. Sterry Hunt. 
Dr. T. Sterry Hunt in recent papers in the American Natura- 
list has reviewed the Taconic question. He discards entirely the 
investigations which during the past fifteen years have been car- 
ried on in the eastern portion of the Taconic area by Dana, 
Dwiffht, Wins: and others, and reaches the conclusion that the 
Taconic consists of two parts, one primordial and one pre-primor- 
dial. This is diverse from the late result of Mr. Walcott, who 
states unqualifiedly that the lowest rock of the Taconic of 
Emmons contains primordial fossils. The primordial section of 
the Taconic, Dr. Hunt would group in the Cambrian, and the 
rest of the Taconic he would maintain as a distinct portion of the 
Archean. 
Prof. Jui.es Marcou. 
Mr. Jules Marcou, of Cambridge, in the Proceedings of the 
American Academy of Science and Arts, of Boston, about three 
years ago published a strong and lucid argument, based on 
stratigraphic and paleontologic facts and on historical documents, 
showing the right and the prior use of the term Taconic in 
geological nomenclature. 
Dr. Alexander VVinchell. 
Dr. A. Winchell, of Ann Arbor, has given me a thorough and 
independent review of the whole Taconic controversy, based on 
