112 Transactions of the South African Philosophical Society. 



the Plesiosaurs and Chelonians from association with the Anomo- 

 donts, I think it will nevertheless be advisable to retain Osborn's 

 names. Boulenger prefers Cope's name of Theromora for ■ the 

 mammal-like reptiles ; but this name seems untenable owing to 

 Cope's having made the Pelycosaurs the type of the group — forms 

 which Boulenger agrees in placing in the Bhynchocephalian division. 

 Boulenger' s group — the Herpctomorpha — is nearly synonymous with 

 Osborn's Diapsida. 



