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(12). An Attempt to Determine the Horizons of the Fossil Vertebrates 

 of the Karroo. By E. BROOM, D.Sc. 



Eecently I made a list of the genera of the fossil vertebrates of the 

 Karroo, and endeavoured to place them in the variolas horizons. 

 The following is an attempt to review and determine the horizons 

 of the more important species. 



In South Africa we have been singularly fortunate in having had 

 most of our types founded on skulls or teeth, so that there is no 

 great burden of synonymy. In the following lists I have almost 

 entirely ignored types founded on vertebras or fragments of 

 skeletons, as most of these are probably portions of animals 

 already known from the skulls. In many cases it will be long 

 before it will be possible to identify every limb bone, but in the 

 large majority of cases, where new types have been founded on 

 limb bones or other portions of the skeleton than skulls, I have 

 satisfied myself that a mistake has been made in conferring a 

 new name. 



