. Bulletin of the Geological Society of America. Geology. REVIEW OF GEOLOGIC INVESTIGATIONS 259 To complete this sketch of the history of geologic studies in this prov- ince, it will be necessary to enumerate the paleontologic collections made by previous investigators. The first reference to fossils from the Upper Yukon basin appeared in a paper by Meek/'^ published in 1867. In this five Devonian species, reported to have been found on the Porcupine river in' Eussian America, are included with the fossils described from the Mackenzie river. These fossils, which are stated to have been obtaine
. Bulletin of the Geological Society of America. Geology. REVIEW OF GEOLOGIC INVESTIGATIONS 259 To complete this sketch of the history of geologic studies in this prov- ince, it will be necessary to enumerate the paleontologic collections made by previous investigators. The first reference to fossils from the Upper Yukon basin appeared in a paper by Meek/'^ published in 1867. In this five Devonian species, reported to have been found on the Porcupine river in' Eussian America, are included with the fossils described from the Mackenzie river. These fossils, which are stated to have been obtained in part by Kennicott from a missionary in course of the journey already referred to, are credited to three different localities on the Porcupine. The locality described for Favosites polymorpha would be not far from Fort Yukon, in the Yukon flats, or nearly 100 miles from the nearest out- crop of bedrock. Examination of the specimens shows that they came from a rock material different from any of the fossiliferous horizons of the Devonian observed by the writers either on the Porcupine or Yukon rivers. It appears probable that the five species credited to the Porcupine river were all obtained from the Eeverend W. W. Kirby, and that they all came originally from the IMackenzie and not from the Yukon. In his account of the journey up the Yukon in 1867, Dall mentions having found, "just above the Eamparts, pebbles of Niagara limestone with its characteristic ;^^ No information concerning the species represented in these pebbles appears in connection with this observation nor in subsequent papers. McConnell reports having foimd Atrypa reticularis and crinoid stems in the yellow limestones of the lower Eamparts while descending the Por- cupine river in 1889, and states that these limestones "are probably refer- able in part at least to the Devonian.'^^* The writers' observations seem to indicate that only Silurian and Ordovician rocks are present in the lowe
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