42. Bolton, H. 1896. The animal life of the Lancashire Coal Measures. Trans. Manchester Micros. Soc., 123-135 (1895).

43. ——. 1904. The paleontology of the Lancashire Coal Measures. Trans. Manchester Geol. Soc., XXVIII, 378-420, 578-650, 668-689.

44. Boulenger, G. A. 1890. On the presence of pterygoid teeth in a tailless batrachian (Pelobates cultripes), with remarks on the localization of teeth on the palate in batrachians and reptiles. Proc. Zool. Soc. London, 664-666.

45. ——. 1904. On the characters and affinities of the Triassic reptile Telerpeton eligense. Proc. Zool. Soc. London, 470-480, pl. xxx.

46. ——. 1910. Les Batraciens et principalement ceux d'Europe. I. Paris.

47. Bradley, Frank H. 1870. Geology of Grundy County. Geol. Surv. Illinois, IV, 196.

48. Branco, W. 1887. Weissia bavarica, nov. gen. et sp. von Stegocephalia, ein neuer Stegocephale aus dem unteren Rothliegenden. Jahrb. d. k. Preuss. Geol. Landesanstalt f. 1886, 22-39, taf. 1; also Neues Jahrb. f. Mineral., Geol. u. Paleon., 1888, 117.

49. Branson, E. B. 1905. Structure and relationships of American Labyrinthodontidæ. Jour. Geol., XIII, No. 7, 568-610, figs. 1-19.

50. ——. 1910. Amphibian footprints from the Mississippian of Virginia. Jour. Geol., XVIII, No. 6, 356-358, 1 fig

51. Braun, M. von. 1841. Bericht über die Versammlung deutscher Naturforscher und Aertze. Braunschweig, 74-75. (Trematosaurus.)