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MR. D. M. S. WATSON ON 



Order Dicynodontia. 



Anomodonts with a reduced quadrate and quadratojugal. 

 T-shaped squamosal without otic groove. Fenestra ovale carried 

 down by a long process composed of basioccipital, basisphenoid, 

 prootic, and paroccipital. 



Scapula with acromion. 



Glenoid cavity borne only on scapula and coracoid. Pelvis 

 with a pubo-ischiac vacuity. 



Dicynodon Owen. M. and U. Permian, S. Africa and Russia. 



M. Permian, S. Africa. 

 U. Pennian, ,, 



Scotland. 

 S. Africa. 



Tropidostoma Seeley. 



Endothiodon Owen. 



Cryptocynodon Seeley 



Prodicynodon Broom. 



Pristerodon Huxley. 



Gordonia Newton. 



Geikia ,, 



Kisticephalus Owen. 



Dicelurodon Broom. ,, ,, 



Taognathus ,, ,, ,, 



Kannemeyeria Seeley. M. Trias, ,, 



Lystrosaurus Cope. L. Trias, ,, 



Eubrachiosatirus Williston. M. Trias, Wyoming. 



Placerias Lucas. M. Trias, Arizona. 



Order Theriodontia Owen. 



Anomodonts with carnivorous specialisation and reduced 

 quadrate and quadrato-jugal. Glenoid cavity on scapula and 

 coracoid. 



Sub-Order Gobgonopsia Lydd. 



Theriodonts with the parietal excluded from the temporal 

 fossa. Palate with no suborbital vacuities. 



Sub-Order Cynodontia Owen. 



Theriodonts with a narrow intertemporal bar formed by the 

 parietals. Secondary palate with no suborbital vacuities. 



