250 
With one labyrinth the size of these rotatory movements is about 
half of that of animals with intact labyrinths. 
7. For the intact animal it is possible to calculate the changes 
in the eye-positions by taking the sum of the influences, starting 
from the right and left labyrinths, on the recti super. and infer. 
and the obliqui super. and inf. of the two eyes. 
8. After extirpation of tbe labyrinths on both sides all tonic 
reflexes on the eyes, mentioned above, disappear. 
9. The minimum number of central courses, necessary for the 
explanation of the tonic reflexes of the labyrinths of the rabbit on 
its eyes (so not of the rotations-reactions and caloric reactions), have 
been drawn in a sketch, accompanying fig. 5. 
The uninterrupted lines represent the courses of the recti super. 
and inf., the dotted lines those of the obliqui. 
Each of the four obliqui is influenced from both labyrinths, each 
of the two recti (super. and infer,) from only one labyrinth. 
One labyrinth influences the 4 obliqui, but only the rect. super. 
of the same side and the rect. inf. of the crossed side. For these 
tonic reflexes of the labyrinth for the m.m. externus and internus 
no reliable data could be found. 
