[27] Reptiles of British India, by Dr. A. Günther, F.R.S. London, 1864.
[28] Indian Snakes, by E. Nicholson, Madras Army. Madras, 1870.
[29] Natural History of Reptiles, by P. H. Gosse. 1850.
[30] Encyclopedia Britannica, 1859, see art. ‘Reptilia,’ p. 47.
[31] Ibid. p. 47.
[32] Author of Zoological Researches, and Leaves from the Notebook of a Naturalist.
[33] In the ‘Laidley Worm,’ exhibited at the Grosvenor Gallery in 1881, the artist must have copied one of these.
[34] Elementary Lessons in Physiology. London, 1875.
[35] Tome i. p. 126 of Erpétologie générale.
[36] Ibid. p. 135.