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AMERICAN JOURNAL OF SCIENCE. 
[THIRD SERIES.] 
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Arr. XXXI.— Monograph by Professor MARSH on the Odont- 
ornithes, or Toothed Birds of North America.* 
should rest, as Professor Marsh’s work sh : t 
complete range of evidence and perfection of material ever 
at the disposal of the author of a m r paleon- 
1S Concerned, representations of recent bones, and, we might 
almost say, of recent skeletons. In fact, in the case of one 
dozen of the small bones are missin : in Lcehthyornis 
and Apatornis, also, the remains are remarkably perfect, con- 
sidering the fragile character of birds’ bones. ‘The success of 
characteristic, As a reward for his energy, Professor Marsh 
as the satisfaction of having obtained, so far as known, all the 
bird remains that have ever been collected from the Kansas 
Odo mtornithes : A Monograph on the Extinct Toothed Birds of North America ; 
Men thirty-four plates and forty woodcuts. By OTHNieL CHARLES Marsu, 
ihe fessor of Paleontology in Yale College. 4to, pp. i-xv. 201. Exploration of 
40th Parallel, Vol. Vil. Washington, D.C. 1880. 
Am. Jour. $c1.—Tuirp Series, Vou. XXI, No, 124.—ApriL, 1881. 
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