160 IN CONFIRMATION OF THE GENUS OWENIA SO-CALLED, 



not avail to excuse an offence against the letter of a law of nomen- 

 clature should an objector choose to exact the penalty. Conse- 

 quently, the writer, brought to a sense of duty by a palaeontological 

 friend of well known judgment who happened to be in Brisbane 

 when the fossil was received, now begs permission to withdraw 

 the name Owenia and substitute for it the modification 



Euowenia. 



Characters : — Dentition i ^-, c $, ^ 4 j-, m f. 



Incisors conical, diverging, curving outwards and downwards , the 



° °' ° upwards ' 



lower receiving the upper upon and between them, the posterior 

 upper incisor subrudimentary. 



Premolars subtriangular, unilobate, with posterior talon and 

 incomplete external cingulum. Molars of the normal form in the 

 Nototheriidce. Nasals narrow, short, not covering the narial 

 aperture anteriorly. Jugals slender. Naso-frontal region as in 

 Nototherium (nee Zygomaturus) and Diprotodon, not greatly 

 depressed. 



The almost complete reduction of the upper incisors to a single 

 functionary pair, and the strong curvature of both upper and lower 

 incisors are good generic characters. 



The newly acquired mandible, for which a suitable name may 

 be Euowenia robusta, indicates a species far removed from identity 

 with E. grata, mihi. This will be best seen from the following 

 statement. 



Mandibular characters of the two species : — 



Habit weak ; symphysial gradient steep ; inferior contour 



angular; mesially rather concave ; incisors rotund grata. 



Habit robust ; symphysial gradient low ; inferior contour 



parabolic ; incisors compressed robusta. 



The fossil consists of the inferior moiety of the articulating limb 

 with the dentary limb of the left side in natural conjunction with 

 the anterior half of the dentary limb of the right side, all the 

 teeth of the parts preserved being in place except m 3 of the left 

 side, which has been destroyed by a recent fracture of the jaw. 



