Fossil Fish Remains. 281 



^ood idea of the variation in the teeth from different parts of 

 the jaw. In common with previous authors we have included 

 several of Agassiz's species which were evidently given to desig'- 

 nate teeth from different parts of the same jaw ; the more erect 

 and typical hastalis representing the large anterior teeth, 

 xiphodon tho'se of an intermediate position, plicatilis those of 

 a lateral position, and smaller oblique forms representing the 

 postero-laterals. 



In America this species is Eocene, whilst in Europe it is 

 generally Miocene, but extends also into the Pliocene, some of 

 which are evidently derived from older beds. 



This species was recorded for Victoria by the late Sir F. 

 McCoy under the name of 0. trigonodon in 1866 (15, p. 17). 



Oxyrhina desori, Agassiz. 



Oxp'hina desorii, Agassiz, 1843. Poiss. Foss., vol. iii., p. 202, 

 pi. 37, figs. 8-13. 



Ox-yrhina leptodou, Agassiz, 1843. Ibid., p. 282, pi. 37, figs. 

 3-5. 



Oxyrhina grandis, Davis, 1888. Trans. Roy. Dublin Soc, ser. 

 2, vol. iv., p. 30, pi. 5, figs. 15, 16. 



Oxyrhina deisorii, Ag., A. S. Woodward, 1889. Cat. Foss. 

 Fishes, Brit. Mus. Nat. Hist., pt. i., p. 382. 



Oxyrhina desorii, Ag., L. Seguenza, 1900. Boll. Soc. Geol. 

 Ital., p. 482, pi. 5, figs. 1-12. 



Locality and Horizon. — Waurn Ponds, near Geelong (Nat. 

 Mus. Coll., purchased from J. F. Bailey, and from Mines De- 

 partment [4766] ; also J. F. Mulder Coll. and Pritchard Coll.). — 

 Jan Jukian. 



Birregurra (J. F. Mulder Coll.). — Barwonian. 



Beaumaris, Port Phillip (Dixon Coll.; Pritchard Coll.); 

 Grange Burn (Spry Coll.). — Kalimnan. 



Obser\^ations. — Tlie figures given by Davis represent the 

 strong anterior teeth, and we also have the more slender and 

 more oblique laterals. 



This species is Upper Eocene in North America, and Upper 

 Eocene, Miocene, and Pliocene in Europe. In New Zealand it 

 occurs in the Waipara and Oamaru formations, Upper Cretaceous 

 and Oligocene respectively. 



