Annals of the New York Academy of Sciences, Volume 27

Front Cover
Edmund Otis Hovey, Ralph Winfred Tower
New York Academy of Sciences, 1917 - Science
0 Reviews

What people are saying - Write a review

We haven't found any reviews in the usual places.

Other editions - View all

Common terms and phrases

Popular passages

Page 90 - Osteology of Haplocanthosaurus, with description of a new species, and remarks on the probable habits of the Sauropoda and the age and origin of the Atlantosaurus beds.
Page 44 - ... invertebrates were noticed. It is probable that they will be found lower down, as the dinosaurs occur much lower. "22. Brown to bluish-gray arenaceous limestone 8 in.
Page 137 - W. — 1909. Osteology of the Jurassic reptile Camptosaurus, with a revision of the species of the genus, and descriptions of two new species.
Page 111 - ... clays with the horizontal banding and frequent nodular ledges also correspond closely to the clays comprising the Oreodon Beds of the White River. Let us attempt to trace the history of the Jurassic formation as evidenced by the nature of the rocks, the stratigraphy and the occurrence of fossils: Given an arm of the Jurassic sea, fed by rivers and open to the ebb and flow of tide waters. Under these conditions the sediments washed down by the river everywhere accumulated slowly, and alternating...
Page 105 - Geratodus only are known, and inasmuch as this genus is supposed to range from the Trias to the present time, these species have no correlating value whatever. "To sum up: there is no valid vertebrate evidence pointing to an age greater than the Purbeck for the Atlantosaurus beds, and but very little for a greater age than that of the Wealden.
Page 103 - Jlypsiloplwdon. again a Wealden type, and the crocodile, Goniopholis, is reported from the Wealden and its marine equivalent, the Purbeckian, not from the older Jurassic levels. "The weight of this evidence would seem to place this fauna beyond the Jurassic into the beginning of Cretaceous times.
Page 199 - Cl is charged in the usual way, but accumulates a charge which is proportional, not to the original signal strength, but to the final amplitude of the oscillations in the grid circuit. The result is a current in the telephone much greater than would have been obtained from the original oscillations in the circuit.
Page 105 - Marsh) is not at all decisive. If the species is correctly referred to Compsemys, all its related forms are of Cretaceous age. Nor is there any evidence to be obtained from the pterosaurs or birds. Of the mammals I will not venture to speak, save that I think that there are too few forms known from the Wealden to offer 1 American Journal oj Science, November, 1895, p.
Page 103 - Titanosaurus is referred by Lydekker to probable Upper Greensand. Remains of the Sauropoda are spoken of as "frequent" in the Wealden, while from the Middle Jura only a few are known, and all these are of one, or at most two, species. I certainly cannot see what evidence these forms present that would lead one to say that the American forms are clearly Jurassic. The range of this suborder, so far as is known, is from the Middle Jurassic to the Upper Cretaceous, though there may be doubt as to the...
Page 106 - Arundel and Kootenie] have a great many elements in common, and upon the basis of the floras alone the conclusion would be reached that the base of the Kootenie was approximately the same age or slightly older than the base of the Patuxent.

Bibliographic information