[117]

Arch. Naturg. lviii. 1891, p. 66.

[118]

P. Boston Soc. vol. vi. 1848.

[119]

Zeitschr. wiss. Zool. Bd. v. 1854, p. 344.

[120]

Arch. Anat. 1858, p. 289.

[121]

Ibid. 1858, p. 558.