398 



VOICE AND SPEECH. 



short and wide, and that, with the exception of the anterior fourth, 

 the ligamentous and a part of the cartilaginous glottis is open and 

 the slit between the vocal bands is linear in shape. As the voice 

 ascends the scale the vocal bands increase in length and decrease in 

 width, until at the highest note of the register they can be seen to 

 have become considerably longer. It can also be observed that the 

 ligamentous portion of the glottis is still open to the same relative 

 extent, and that the cartilaginous portion has opened to its full ex- 

 tent. In the photograph representing the lower note the anterior 

 faces of the arytenoid cartilages can be seen. As the voice ascended, 

 the capitula Santorini were tilted forward. This seems to be proved 



E 



FIG. 221. 



by the change in the position of these structures as seen in the 

 photograph representing the upper note, as well as a similar change 

 to be seen in nearly all the series showing the registers which I 

 have taken. The epiglottis, though not well illuminated, seems 

 to have risen as the voice ascended the scale. The light upon the 

 epiglottis is so weak that the structure does not appear at all in 

 the photo-engraving. The vocal bands have increased in length 

 at least \ inch in 7 notes. The compass of the voice of this sub- 



