Footprints of Hylopus Logani, Dawson, Lower Carboniferous, 

 Nova Scotia. 

 Natural size and reduced. 

 These footprints were the first indications of Carboniferous land verte- 

 brates ever observed; they were probably made by a Microsaurian and one 

 of the earliest species of this type. They show a remarkable length of 

 stride and development of limb. 



