6o 



Journal of Comparative Neurology. 



It is with a keen sense of gratitude that I now acknowl- 

 edge my indebtedness to Professor Wilder whose advice has 

 been frequently sought and who has always shown great interest 

 in the work. I desire also to thank Professor Simon H. Gage 

 and Instructor Pierre A. Fish for their interest and assistance, 

 and Mrs. S. P. Gage for the loan of specimens. 



The following list, while incomplete, will give some idea 

 of the extent and nature of the material upon which the writer 

 has based his conclusions. The accession numbers are the serial 

 numbers in the Accession Book of the Department of Verte- 

 brate Zoology of the Cornell University. 



