91. ——. 1907. Revision of the Pelyeosauria of North America. Pub. No. 55, Carnegie Inst. Washington, Stegocephalia, 159.
92. ——. 1908. On the value of the evidence furnished by vertebrate fossils of the age of certain so-called Permian beds in America. Jour. Geol., XVI, No. 6, 572-580.
93. ——. 1908. Notes on the skull of Lysorophus tricarinatus Cope. Bull. Amer. Mus. Nat. Hist., XXIV, 531-533, fig. 1.
94. ——. 1908. Description of vertebrate fossils from the vicinity of Pittsburgh, Pa. Annals of the Carnegie Museum, IV, Nos. III-IV, 234-241, pl. lix, Apr.
95. ——. 1908. A great Permian delta and its vertebrate life, with restorations by the author. Pop. Sci. Month., LXXIII, No. 6, 557-568.
96. ——. 1910. New or little-known reptiles and amphibians from the Permian? of Texas. Bull. Amer. Mus. Nat. Hist., XXVIII, art. XVII, 163-181.
97. ——. 1911. A revision of the Cotylosauria of North America. Pub. No. 145, Carnegie Inst. Washington.
98. ——. 1911. Revision of the Amphibia and Pisces of the Permian of North America. Pub. No. 146, Carnegie Inst. Washington, 1-148, pls. 1-25, 51 text-figs.
99. ——. 1912. Paleozoic Reptilia and Amphibia. Bull. Geol. Soc. Amer., 23, 200-204.
100. ——. 1915. The Permo-carboniferous beds of North America and their vertebrate fauna. Pub. No. 207, Carnegie Inst. Washington, 1-176, pls. 1-24.