[267]

Turner, Journ. Anat. and Phys. vii. 1873, p. 233.

[268]

Stannius, op. cit. pp. 197, 198; Owen, op. cit. p. 428, et seq.

[269]

For references, see Macallum, Journ. Anat. and Phys. xx. p. 624 et seq.

[270]

Wiedersheim, op. cit. p. 556.

[271]

Howes, op. cit. p. 393.