PLATE XIII. 
ILLUSTRATING THE PAPER OF WARREN H. EVERETT, p. 176. 
Fic. 3. The membranous ear as seen from in front. It shows the over- 
lapping of the connecting tube of the posterior canal (p. c. t.) over the sinus 
utriculus (sin. u.). It also shows the position of the nerve (n.) which sup- 
plies the recessus utriculus (r. u.) and the ampull of the horizontal and 
anterior canals (h. a.) (a. a. ). 
Fic. 4. The membranous ear as seen from behind. It shows the pos- 
terior canal (p.c¢.) and the tube (d. ¢. p.) that connects it with the sacculus 
(s.), lagena (1.) and sinus utriculus (sin. u.) as seen from a posterior direc- 
tion. It shows the angle of the horizontal canal (h. c.) with respect to the 
body of the ear. Also a general end view of the sacculus (s.). It also shows 
the ampullar tube (a. t.) of the horizontal canal (h. ¢. ). 
Fic. 5. The membranous ear as seen from above. It shows the large 
curve made by the horizontal canal (h. ¢. ) and the shape of the ampulla (h. a. ) 
of the horizontal canal (h. ¢.) together with the angle at which it enters the 
utriculus (u.) at the base of the anterior ampulla (a. a.). The darkened line 
from the horizontal and anterior ampullz represents the diagonal line of 
depression (**) which marks the separation of the utriculus (u.) and sac- 
culus (s.). This view also shows the angle between the posterior and an- 
terior canals (p. c¢.), (a. ¢.). 
Fic. 6. This is a drawing traced from a photograph of ear, eye and 
brain. It shows the angles made by the anterior and posterior canals with 
the axis of the head and with each other. Also the position of the ear as 
referred to the eye and brain. 
