ORDER ANOMODONTIA. 



I063 



lying nearly parallel to the sacrum ; and there is a small obturator 

 foramen. The humerus (fig. 978) is expanded at the two ex- 

 tremities, with a prominent deltopectoral crest, 1 and with the lower 

 aperture of the entepicondylar foramen opening on to the palmar 

 aspect. The members of this group are found in the Stormberg 

 and Beaufort beds of the Karoo system of South Africa, and the 

 equivalent Gondwanas of Central India. 



Family Dicynodontid^. — This family is characterised by the 

 absence of teeth on the palate. The type genus Dicynodoii was 

 the first known representative of the order, and was originally 

 described by Sir R. Owen from specimens brought from South 



Fig. 985. — Lateral view of the skull of (a) Dicynodon lacerticeps, and (b) Udenodon Baini; 

 from the Karoo system of South Africa. Reduced. (After Owen.) 



Africa. It is characterised by the presence of a tusk-like tooth 

 (fig. 985, a) growing from a persistent pulp in each maxilla — the 

 rest of the jaws being edentulous, with trenchant edges. The 

 profile of the skull is rounded, the maxillae are not strongly ridged, 

 the nares are approximated to the muzzle, and the supraoccipital 

 forms a broad bar above the foramen magnum. This genus may 

 also occur in the Panchet stage of the Indian Gondwanas. In 

 D. tigriceps the skull has a length of 20 inches. In Ptychosiagian 2 



1 The deltopectoral crest is the ridge on the right side of the upper half of the 

 figure. 



- This new name is proposed in lieu of Ptychognathits, which is preoccupied. 

 VOL. II. M 



