Ramsay Wright, op. cit. p. 492.
F. Maurer, Morph. Jahrb. ix. 1884, p. 229; xiv. 1888, p. 175.
Günther, Phil. Trans. clxi. 1871, p. 511; Baldwin Spencer, Macleay Memorial Volume, 1892, p. 1.
Newton Parker, Trans. Roy. Irish Acad. xxx. 1892, p. 161; Bridge, Trans. Zool. Soc. xiv. 1898, p. 361.
Boas, Morph. Jahrb. vi. 1880, p. 345. See Fig. 201, p. [340].