20 



RECORDS VOLUME XI, JAN., 1 9] 9. 



e. The larger vibrating surface of the tym- 

 pans of the Cory Gannet, when compared 

 with the Gannet, the syringeal vibrating 

 membrane being the same, counting out the 



Fi^. 4. Autirior view of Syrinx of Cory Gannet. M, 

 trachea; A, carotid artery; u. w. z. x, other arteries; c, 

 thyroid gland: e. e, bronchialis muscles: s. s. sterno-tra- 

 cheals: o. pessulus: B, B, bronchial tubes: H, heart. 



mere rudiments of the semiluna in the Gan- 

 net, as this is, without doubt, functionless, 

 should give to this species a greater power of 



