This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1859 Excerpt: ...left anterior ray, which has the first and second primary radials included in the cup. "56. View of the anterior side. "5c. The posterior side. Locality and formation.--Hudson River group, Charleton Point, Anticosti. Dendrocrinus Similis, Billings. (D. Similis, Report Geological Survey of Canada, 1S56, page 267.) ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1859 Excerpt: ...left anterior ray, which has the first and second primary radials included in the cup. "56. View of the anterior side. "5c. The posterior side. Locality and formation.--Hudson River group, Charleton Point, Anticosti. Dendrocrinus Similis, Billings. (D. Similis, Report Geological Survey of Canada, 1S56, page 267.) Description.--Cup, small, conical and sub-pentagonal; arms, long, three or four times sub-divided, rather broadly rounded on the back, and comparatively stouter than those of any of the above described species. Of the two arms preserved in the specimen examined, one remains single for a distance of two lines and a half, and then divides; there are five joints in the undivided part; the other arm shews but two joints in the part below the first bifurcation. The column for seven lines below the basal is pentagonal, with round edges and slightly concave faces; it is composed of alternately thick and thin joints, nine of each in the space of two lines, diameter of column nearly one line; length of arms sixteen lines, and the diameter at the undivided part nearly a line on the back. Locality and formation.--Trenton limestone, City of Ottawa. The last three species appear at first sight to be identical, but the moment a magnifying glass is brought to bear upon them, their differences become quite as apparent as those of the large species. In D. acutidactylus the arms are exceedingly thin and sharp on the back above the first division like the edge of a knife, and the column is circular and composed of round edged joints, which at the distance of one-half or three-fourths of an inch become nearly globular. In D. proboscidiatus the column at the base of the cup is pentagonal with the angles so strongly projecting, and the faces so concave that a ...
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