TRANSACTIONS OF SECTION D. — DBPT. ANATOMY AND PHYSIOLOGY. 607 



The author suggested that the origin of such a curious variety as the Manx cat 

 might have occurred in a sport of this kind, as such cases of spina bifida are known 

 to live to maturity ; and if it occurred in a male cat in a limited area like the Isle 

 of Man, the perpetuation of the alteration of structures would be favoured. 



He also suggested as a possibility that the pitting over the human sacrum, to 

 which he had drawn attention, might represent some such process by which the 

 tail which man undoubtedly had lost at some time or other in the history of his 

 development, had been suppressed. 



