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20. On a New Mesosaurian Bcptile (Noteosaurus africanus). By 

 E. BKOOM, M.D., D.Sc., F.E.S.S.Af. 



HITHERTO three species of Mesosaurus have been recognised in 

 South Africa M. tenuidens, Gervais, M. pleurog aster, Seeley, and 

 M. capensis (Giirich). A fourth species is known from Brazil, 

 M. brasiliensis, McGregor, and from Brazil is also known an allied 





Right pes of Noteosaurus africanus. About nat. size. 



Mesosaurian, Stereosternum tumidum, Cope. Though Stereosternum 

 and Mesosaurus agree in most essential characters, they differ in the 

 former having a pubic foramen and the latter a pubic notch. In both 

 genera the digital foramen is in the hind foot 2, 3, 4, 5, 4. The new 

 specimen which I am about to describe is also closely allied to 

 Mesosaurus, but differs in having the digital formula of the hind foot 

 2, 3, 4, 5, 6. 





