Gray, J. E. 1839. Batrachians. Beechey, F. W. ed., The Zoology of Captain Beechey's Voyage; Compiled from the Collections and Notes made by Captain Beechey, the Officers and Naturalist of the Expedition, During a Voyage to the Pacific and Behring's Straits Performed in His Majesty's Ship Blossom, Under the Command of Captain F.W. Beechey in the Years 1825, 26, 27 and 28, by J. Richardson, N.A. Vigors, G.T. Lay, E.T. Bennett, Richard Owen, John E. Gray, W. Buckland, and G.B. Sowerby. Illustrated with Upwards of Fifty Finely Coloured Plates by Sowerby: 98. London, H. G. Bohn.