92 BIBLIOGKAPHY OF NORTH AMERICAN GEOLOGY, [bull. 271 
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Ofl 
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Osborn (Heniy Fairfield). 
1. Reclassification of the Reptilia. 
Am. Nat., vol. 38, pp. 93-115, 13 figs., 1904. 
Reviews the history and principles of classification of the Reptilia, proposes s 
new classification, and gives definitions of the higher groups. 
2. Paleontological evidence for the original tritubercular theory. 
Am. Jour. Sci., 4th ser., vol. 17, pp. 321-323, 1 pi., 1904. 
3. Recent zoopaleontology. Field expeditions during the past season. 
Science, new ser., vol. 19, pp. 35-36, 1904. 
4:. Recent advances in our knowledge of the evolution of the horse. 
Am. Phil. Sua, Proa, vol. 43, pp. 156-157, 1904. Abstract: Science, new ser. 
vol. 19, p. 717, 1904. 
5. An armadillo from the middle Eocene (Bridger) of North America 
Am. Mus. Nat. Hist, Bull., vol. 20, pp. 163-165, 1904. 
6. New Oligocene horses. 
Am. Mus. Nat. Hist,, Bull., vol. 20, pp. 167-179, 2 pis. and 8 figs., 1904. 
7. Manus, sacrum, and caudals of Sauropoda. 
Am. Mus. Nat. Hist., Bull., vol. 20, pp. 181-190, 6 figs., 1904. 
8. Teleorhinus browni — a teleosaur in the Fort Benton. 
Am. Mus. Nat. Hist,, Buli,, vol. 20, pp. 239-240, 1904. 
9. Now Miocene rhinoceroses with revision of known species. 
Am. Mus. Nat. Hist., Bull., vol. 20, pp. 307-326, 21 figs., 1904. 
10. Tin greal Cretaceous fish Portheus molossus Cope. 
Am. Mus. Nat. Hist, Bull., vol. 20, pp. 377-381, 1 pi. and 4 figs., 1904. 
11. Revised list of casts, models, photographs, and restorations of fos 
sil vertebrates of the Department of vertebrate paleontology 
of the American Museum of Natural History. 
Am. Mus. Nat. Hist., Bull., vol. 20, Supplement, 52 pp., 8 figs., 1904. 
12. On the position of the bones of the forearm in the Opisthoccelii 
or Sauropoda. 
Abstract: Science, new ser., vol. 19, pp. 255-256, 1904. 
13. On the use of the sandblast in cleaning fossils. 
Abstract: Science, new ser., vol. 19, p. 256, 1904. 
11. A reclassification of the Reptilia. 
Abstract: Science, new ser., vol. 19, pp. 256-257, 1904. 
15. On the primary components of vertebrae and their relations t< 
ribs. 
Abstract: Science, new ser., vol. 19, p. LT>7. 1904. 
1(>. The classification of the Reptilia. 
Abstract: Science, new ser., vol. 19, pp. 307-308, 1904. 
