14 RECOIIDS VOLUME XI, JAN., 1 91 9. 



syringeal organs differ greatly and so does 

 the tongue. This latter named organ is .56 

 long, flattened and triangular in form, fig. 2, 

 F, c, and the thyro-hyals are provided with 

 muscles which are proportionately as strong 

 as those of the Gannet, ib. h, h. The dis- 

 tance between the base of the tongue and 

 the larynx is short, about .50. The larynx 

 differs consideably from that of the Gannet, 

 and the mechanism is very peculiar, ib, F, s, 

 shows the lar\aix and q the slit opening in- 

 to the trachea, m. Back of this opening, sup- 

 ported by a small bone, is a cube-shaped mus- 

 cle which is drawn downward and forward 

 when the entrance to the trachea is being 

 closed, thus coming in contact with the low- 

 er wall of the larynx and the projection ex- 

 tending backward from the base of the 

 tongue. Fig. 2 where I have given a section- 

 al view of the larynx at A; c, is a portion of 

 the basi-hyal; q one side of the slit; below A 

 the muscle over the closing valve; e, the 

 valve with the supporting bone on the up- 



