Acta Ac. German, Halle, xli. Part II. No. 1, 1879.
Recueil Zool. Suisse, iii. 1886, p. 313.
Vide p. [335].
P. Phys. Soc. Edinb. vol. i. 1856, p. 165; and Edinb. New Phil. Journ. vol. iv. (n.s.) 1856, p. 313; Ann. Sci. Nat. 4th ser. vol. xi. 1859, p. 150; and F. D. Dyster, Tr. Linn. Soc. London, vol. xxii. 1859, p. 251.
Ann. Sci. Nat. 4th ser. vol. x. 1858, p. 11.