82 THE GENESIS AND STRUCTURE OF THE MEMBRANA TECTORIA. 



The present investigation has been carried out in the anatomical laboratory 

 of the medical school of the Western Reserve University, Cleveland, Ohio. It is 

 an agreeable duty to me to express my very sincere thanks to this university and 

 to the staff of the anatomical department, in which I received gracious hospitality 

 for nearly two years and was allowed to continue my scientific researches. My 

 best thanks go mainly out to Professor Dr. T. Wingate Todd, who put at my 

 disposal all the material, the reagents, and the instruments needed for my investi- 

 gation. Owing to his kindness, to his ability and assistance, I was able to perform 

 this work. I am very happy to pay to him the tribute of my deepest and most 

 heartfelt gratitude. I also thank very much Mr. G. G. Marshall, who supplied 

 me with a very interesting collection of bats. 



