26 



C. WINKLEE. THE CENTRAL COURSE 



Of course a scheme as represented here, has no further signi- 

 ficance than that it may be of some aid to get a prompt orien- 

 tation in the position of the operated animal. In the photo (fig. 13) 

 the forced attitude , characteristic for the head and neck is repre- 

 sented, as shown when the animal is kept swinging free in the 



bfrfiJK. L&HJL 



Fig. 12 



Scheme of the medial plane from a rabbit, swinging free above a horizontal plane after 



removal of the left labyrinth. The cervical part is turned 90 upon the caudo- 



thoracic part, and the cranial part has turned upon the cervical in 



u 9 ,in /3 135, in y 180. Seen laterally from the right side. 



air. Neither does this position change when the animal is sitting 

 down on the ground. A comparison between fig. 13 and the posi- 

 tion , designed in fig. 14, A B, will easily enable us to form 

 a just estinate of the attitude of head and neck, with the aid of 

 the scheme and its description. More-over the conformity between 

 the characteristic position of head and neck in rabbits and that 

 shown by pigeons (see fig. 14, C) is so striking, that it may be pre- 

 sumed a similar mechanism is working in both. These latter figures 

 however have been taken from animals, showing no longer any rol- 

 lings around their longitudinal axis towards the operated side , 3 

 or 4 weeks after the operation. 



For, besides the forced position of head and neck, the position 



