[352]

For the blood-supply of the air-bladder see Chap. XII.

[353]

See Chaps. XIV. XIII. and X.

[354]

Moreau, Ann. d. Sci. Nat. (6) iv. 1876, Art.

[355]

Moreau, op. cit.

[356]

Bridge and Haddon, op. cit. p. 286.