xvili Preface. 



1903 



49. On Certahi Gnwra and Species of AWth American Cretaceous 



Actinopterous Fishes. By O. P. Hay. \'ol. XIX, Article i, pp. 

 1-95, pll. i-v, and 72 text figures. March 4, 1903. Price, $1.95. 



50. The Fauna of the Titanotheriiim Beds at Pipestone Springs, Mon- 



tana. By W. D. Matthew. Vol. XIX, Article vi, pp. 197-226, 

 and 19 text figures. May 9, 1903. Price, 40 cents. 



51. A Fossil Hedgehog from the American Oligocene. By W. D. 



Matthew. Vol. XIX, Article vii, pp. 227-229, and i text figure. 

 May 9, 1903. Price, 10 cents. 



52. Adaptive Significance of the Shortening of the Flephanf s Skull. 



By \V. K. Gregory. Vol. XIX, Article ix, pp. 387-394, pi. xxiil 

 and 4 text figures. July 8, 1903. Price, 10 cents. 



53. On a Collection of Upper Cretaceous Fishes from Mount Lebanon, 



Syria, icith Descriptions of Four Neiv Genera and Nineteen Neiv 

 Species. By O. P. Hay. Vol. XIX, Article x, pp. 395-452, 

 pll, xxiv-xxxvii. July 8, 1903. Price, 95 cents. 



54. Ornitholestes hermanni, A A'eio Compsognathoid Dinosaur from 



the Upper furassic. By Henry Fairfield Osborn. Vol. XIX, 

 Article xii, pp. 459-464, and 3 text figures. July 23, 1903. 

 Price, 10 cents. 



55. A Ne-w Three- Toed Norse. By J. W. Cidley. Vol. XIX, Article 



xiii, pp, 465-476. July 24, 1903. Price, 10 cents. 



56. On Two species of Platygonus from the Pliocene of Texas. By J. 



W. Gidley. Vol. XIX, Article xiv, pp. 477-481, and 5 text 

 figures. July 24, 1903. Price, 10 cents. 



57. Glyptotlierium texamim, A New Glyptodont, from the Lower 



Pleistocene of Texas. By Henry Fairfield Osborn. Vol. XIX. 

 Article xvii, pp. 491-494, pi. xliii. August 17, 1903. Price, 

 15 cents. 



58. A New Genus of Ground Sloth from the Pleistocene of Nebraska. 



By Barnum Brown. Vol. XIX, Article xxii, pp. 569-583, pll. 

 L and LI. October 28, 1903. Price, 35 cents. 



59. I'he Fresh-ll^ater Tertiary of Northwestern Texas. American 



Museum Expeditions of 1899-1901. By J. W. Gidley. \'ol. 

 XIX, Article xxvi, pp. 617-635, pll. lii-lviii. November 21, 

 1903. Price, 85 cents. 



60. Skull of Triceratops serratus. By Richard Swan Lull. Vol. XIX, 



Article xxx, pp. 685-695, pi. i.ix, and 1 text figure. Decem- 

 ber 24, 1903. Price, 20 cents. 



61. The Skull of Creosaurus. By Henry Fairfield Osborn. Vol. XIX, 



Article xxxi, pp. 697-701, and 2 text figures. December 24, 

 1903. Price, 10 cents. 



