303. Hancock, A. 1869. Note on Anthracosaurus. Ann. and Mag. Nat. Hist., 4th ser., IV, 270.
304. Hancock and Atthey. 1868. Notes on the remains of some reptiles and fishes from the shales of the Northumberland Coal Field. Ann. and Mag. Nat. Hist., 4th Ser., I, 266-278, pls. xiv-xvi.
305. ——. 1869. On a new Labyrinthodont Amphibian from the Northumberland Coal Field and on the occurrence in the same locality of Anthracosaurus. Ann. and Mag. Nat. Hist., ser. 4, IV, 182-189; also Nat. Hist. Trans. Northumberland and Durham, in, 1869, 330. (Urocordylus reticulatus.)
306. ——. 1870. On Urocordylus, Pteroplax. Nat. Hist. Trans. Northumberland and Durham, III.
307. ——. 1870. On the occurrence of Loxomma allmanni in the Northumberland Coal Field. Ann. and Mag. Nat. Hist., ser. 4, V, 374-379.
308. ——. 1870. Description of a Labyrinthodont Amphibian; a new generic form obtained in the Coal Shales at Newsham. Ann. and Mag. Nat. Hist., ser. IV, VI, 56-65, pl. i. (Batrachiderpeton lineatum.)
309. ——. 1871. Description of a considerable portion of a mandibular ramus of Anthracosaurus russelli, with notes on Loxomma and Archichthys. Ann. and Mag. Nat. Hist., 4th ser., VII, 73, pl. vi.
310. ——. 1871. Batrachiderpeton. Nat. Hist. Trans. Northumberland and Durham, IV, 208.
311. Hancock and Howse. 1870. On a new Labyrinthodont Amphibian from the magnesium limestone of Midderidge, Durham. Quart. Jour. Geol. Soc., XXVI, 556-564, pl. 38. Permian of England, Lepidotosaurus duffii, a Labyrinthodont of some 3 to 4 feet in length.
312. Haeckel, Ernst. 1895. Systematische Phylogenie der Wirbelthiere (Vertebrata). Amphibia, 266-283. Also History of Creation, Trans., 5th ed., 1909, n, 295-300.