CLA SSIFICA TION OF VER TEBRA TA 1 8 



2. Sub-order RH YXCIKx'KIMIALI, Guenther. 

 Ethynchosaurua Keuper, England. 

 Byperodapedon. Keuper, England; India. 

 Homoeosaurus. Upper Jura, (Jisrmany. 

 Sphenodon. New Zealand. 



3. Sub-CLASS THEROMORPHA, Cope 



Stneospondylous, amphicoelous. Pubes and ischia fused 

 together. 



Bumerus with entepicondylar foramen. Quadrate fixed. 

 Rita with capitulum and tuberculum. 

 Pentadactyle walking limbs. 



1. * >rder Anomodontia, Owen. Walking limbs. Sacrum 

 with five to six vertebrae. 



Triple occipital condyle. Without intercentra. 

 Teeth absent, or restricted to one pair of upper tusks. 



Oudenodon. L. Trias, S. Africa ; Permian, Ural ? 



Dicynodon. L. Trias, S. Africa ; Bengal ; Elgin. 



2. Order Theriodontia, Owen, s. Pelycosauri, Cope. With 

 intercentra. Two or three sacrals. 



.Mostly with differentiated incisors, canines, and molars. 

 Triple occipital condyle. 



Lycosaurus. Trias, South Africa. 

 Cynodraco. Trias, South Africa. 

 G alesaur us. Trias, South Africa. 

 Clepsydros. Trias, U.S.A. 

 Dimetrodon. Trias, U.S.A. 

 :'.. Order Pareiosauri, Zittel. Teeth in uniform series. 

 Two sacrals. With triple occipital condyle. Caudal intercentra. 

 PajmisaujiLS. L. Trias, South Africa. 

 Elginia. L. Trias, Elgin. 

 4. Order Placodontia, von Meyer. Skull only known. 

 Palate with large, broad teeth. Marine, European. 

 Placodus. Muschelkalk, Germany. 



4. Sub-CLASS CROCODILIA, Wagler 



Stereospondylous. Quadrate fixed. Ribs with capitulum 

 and tuberculum. Two sacral vertebrae. Pentadactyle walk- 



