90 



ANNALS OF SCOTTISH NATURAL HISTORY 



A. - DlCYNODONTIA. 



Gordonia Traquairi. 



Huxleyana 



Geikia Elinensis. 



Gordonia Duffiana. 

 Juddiana. 



B. PAREIOSAURIA. 



Elginia mirabilis. 



Of the Dicynodontia, the new genus Gordonia is closely 

 allied to the type genus Dicynodon in having the jaws edentu- 

 lous, with the exception of two large, pointed tusks, one in the 



FIG. i. Skull of Gordonia Traquairi, Newton, one-half natural size, taken from 

 a cast in gutta percha. Reduced from E. T. Newton's figure, Plate XXVI. 

 /, Tooth ; ;;, nasal opening ; orb, orbit ; tan, temporal fossa ; p, palate ; 

 qti, quadrate. 



maxilla of each side, and growing from permanent pulps like 

 the tusk of a boar or the incisor of a rabbit, but specially 

 characterised by the presence of two post-temporal fossee on 

 each side of the occiput and the comparative slenderness of 

 all the bones of the skull. Four species, characterised by 

 slight di (Terences in the shape of the cranial bones, are recog- 

 nised, viz. G. Traquairi, G. Hnxleyana, G. Dnffiana, and G. 

 Juddiana. The first of these is the original Elgin Dicynodont 

 noticed by Professor Judd and myself at the British Associa- 

 tion Meeting at Aberdeen in 1885 ; and in Fig. i, Mr. New- 



