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Proceedings of the Royal Society of Edinburgh. [Sess. 
fact that no explanation is proffered as to how this evolution has occurred in 
either case. When Professor Klaatsch of Heidelberg was in Adelaide about 
Alligator Tribe. (Photograph by Mr Foelsche.) 
a year ago, Dr Rogers showed him a large number of photographs illustrating 
these variations of type, and presented him with some illustrative examples. 
Body Markings. 
Towards the end of 1903 an English gentleman, Captain Hayes, wrote 
to me regarding “ recognition marks,” which, he said, “ our Society people 
