P.Z.S. 1895, p. 150.

[64]

See also M. von Chauvin, Zeitschr. wiss. Zool. xxxviii. 1883, p. 671.

[65]

E. T. Emerson, Proc. Boston Soc. xxxii. 1905, p. 43.

[66]

Nature, lx. 1899, p. 389.

[67]

Amer. Natural. xix. 1885, p. 1226.

[68]