66 



The Dancing Mouse 



h.b. 



(21 p. 477). Kishi merely suggests that the condition of 

 the stria may account for the deafness of the mouse ; he does 



not feel at all 



OC/ -i 



- v- confident of the 



truth of his ex- 

 planation, and he 

 therefore prom- 

 ises in his first 

 paper a contin- 

 uation of his 

 work in an inves- 

 tigation of the 

 functions of the 

 stria. This, how- 

 ever, he seems 



FIGURE 12. The inner ear of the dancer. Repro- _ ^ ^ have ac- 

 duced from Kishi's figure in the Zeitschrijt jiir wissen- 



schajtlicheZoologie, Bd. 71. c.c. crus simplex; o.b. anterior COmpllSneQ ^tflUS 

 vertical canal; h. b. posterior vertical canal ; a. b. horizontal ^j- 

 canal. . 



The static ap- 

 paratus Kishi describes as closely similar in form to that 

 of the gray mouse. In none of his twelve preparations of 

 the ear of the dancer did he find such abnormalities of form 

 and connections in the semicircular canals as Rawitz's 

 figures and descriptions represent. Rawitz states that the 

 anterior canal is normal except in its lack of connection with 

 the posterior and that the posterior and horizontal are much 

 reduced in size. Kishi, on the contrary, insists that all of 

 the three canals are normal in shape and that the usual 

 connection between the anterior and the posterior canals, 

 the crus simplex, exists. He justifies these statements by 

 presenting photographs of two dancer ears which he care- 

 fully removed from the head. Comparison of these photo- 

 graphs (Figures 12 and 13) with Rawitz's drawings of the 



