459. ——. 1908. The ancestry of the caudate Amphibia. Amer. Nat., 42, 361-373, figs. 1-10.

460. ——. 1908. The dawn of quadrupeds in North America. Pop. Sci. Monthly, LXXII, June, 558-566, 5 figs.

461. ——. 1908. The clasping organs of extinct and recent Amphibia. Biol. Bull., XIV, No. 4, Mar., 249-259, with 5 figs.

462. ——. 1909. New forms (extinct Amphibia) from the Carboniferous. Jour. Geol., XVII, No. I, Jan.-Feb., 38-82, 24 figs.

463. ——. 1909. The Carboniferous quadrupeds of Kansas, Ohio, Illinois, and Pennsylvania in their relation to the classification of the so-called Amphibia and Stegocephalia. Trans. Kans. Acad. Sci., XXII, 239-243, pls. 1-3.

464. ——. 1909. Carboniferous air-breathing vertebrates of the United States National Museum. Proc. U. S. Nat. Mus., 37, 11-28, pls. 4-10.

465. ——. 1909. New or little-known forms of Carboniferous Amphibia in the American Museum of Natural History. Bull. Amer. Mus. Nat. Hist., xxvi, art. xxv, 347-357, pls. lviii-lxv.

466. ——. 1909. The Lysorophidæ. Amer. Nat., XLIII, 116. (Review.)

467. ——. 1909. The Stegocephala. Amer. Nat., XLIII, 119. (A review of paper by Hugo Schwarz.)

468. ——. 1909. The morphology of the vertebrate sacral rib. Anat. Anz., xxxiv, No. 15, 361-364.