. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Olen. 490 (Georgian) limestones at Troy; at Shodack Landing; and at Eeynold's Inn, N. E. of Bald Wash. Co., N. Y.—Note. The fragments of this species cannot be distinguished from fragmeuts of Olenellus thompsoni and Olenellus gilherti^ un- less the chest joints (thoracic segments) are got. Olenellus gilberti, of the Eocky Mountains, has not been found on the Atlantic side of the continent. Its head exhibits a large range of variation. It has been


. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Olen. 490 (Georgian) limestones at Troy; at Shodack Landing; and at Eeynold's Inn, N. E. of Bald Wash. Co., N. Y.—Note. The fragments of this species cannot be distinguished from fragmeuts of Olenellus thompsoni and Olenellus gilherti^ un- less the chest joints (thoracic segments) are got. Olenellus gilberti, of the Eocky Mountains, has not been found on the Atlantic side of the continent. Its head exhibits a large range of variation. It has been collected from lime- stone, clay and sand strata, through a section 50' to 300' high, overlying 3000' of Wasatch Mountain red-brown quartzite, of Middle Cambrian age ; in Nevada and Utah in various locali- ties ; and in British Columbia. See Walcott's Bulletin No. 30, U. S. G. S. p. 173. From his numerous figures on plates 18,19, 20 and 21, I have selected pi. 21, fig. 1, normal form of species, except in the unusual prolongation of the third segment, en- larged twice ; fig. 1 a^ shows the actual size ; fig. 2 a^ the actual size of another specimen broadened by pressure in the move-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lesley, J. P. (J. Peter), 1819-1903; Pennsylvania. Board of Commissioners for the Second Geological Survey. Harrisburg, Board of Commissioners for the Geological Survey


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Keywords: ., bookcentury1800, bookdecade1880, booksubjectpaleontology, bookyea