613. ——. 1908. The faunal relations of the early vertebrates. Jour. Geol., XVII, No. 5, 389-402. Also, Outlines of geologic history, Willis and Salisbury, 1910, 163-175.
614. ——. 1908. Lysorophus, a Permian Urodele. Biol. Bull., XV, No. 5, 229-240. Review in Rev. crit. de Paleozoologie 13th Annee, No. 2, 82.
615. ——. 1909. The skull and extremities of Diplocaulus. Trans. Kans. Acad. Science, XXII, 122-13 1, pls. 1-5.
616. ——. 1909. New or little-known Permian vertebrates, Trematops, new genus. Jour. Geol., XVII, No. 7, Nov., 636-658, 7 figs.
617. ——. 1909. Principal characters of the Chelydosauria, a suborder of temnospondylous Amphibians from the Texas Permian. A. A. A. S. Soc. Vert. Paleon.
618. ——. 1910. Dissorophus. Jour. Geol., VIII, No. 6, 526-535, pls. i-iii.
619. ——. 1910. Cacops, Desmospondylus, new genera of Permian Vertebrates. Bull. Geol. Soc. Amer., XXI, 249-284, pls. 6-17.
620. ——. 1910. New Permian Reptiles: Rachitomous vertebræ. Jour. Geol., XXIII, No. 7, 585-600, with figs.
621. ——. 1911. American Permian vertebrates. Amphibia, 9-14, pls. xxxii, xxxviii.
622. ——. 1913. The primitive structure of the mandible in amphibians and reptiles. Jour. Geol., XXI, 625-627, 11 fig.