Fischer, Zool. Gart. 1882, p. 4.
For a detailed anatomical account, see West, J. Linn. Soc. xxv. 1895, p. 419; xxvi. 1898, p. 517; and xxviii. 1900.
Clifford Allbutt's System of Medicine, vol. ii. London, 1896, p. 809.
Erpétologic générale, Suites à Buffon, vol. vii. Paris, 1852.
Catalogue of Snakes, British Museum, London, 1849.