[Proc. Roy. Soc. Victoria, 23 (N.S.), Pt. 11. , liHL] 



Akt. XXIII. — On the systematic position of tJie species 

 of Squalodon and Zeuglodon described from Aus- 

 tralia and New Zealand. 



By T. S. hall, M.A., D.Sc. 



(University of Melbourne). 



(With Plate XXXVI.) 

 [Read 13th October, 1910.] 



M'Cor in 1864:1 described Squahvlon n'ill-insnni from the ter- 

 tiary polyzoal limestone of Cape Colony. 'Tiie specie.s was founded 

 on a single molar tooth in a good state of preservation. In 18662 

 the species was again characterised on the same tooth, but in 

 less rigid terms, and the essay containing the description was 

 reprinted in the following year^. In it M'Coy referred the species 

 to " Squalodon or Phocodon" the names being synonymous. 



In 1875^ the same author published a description of the same 

 tooth for the fourth time, and gave a good figure. Four years 

 latei"^ he figured another tooth of a simpler character, and re- 

 ferred it to the same species as one of the " anterior " teeth. 

 This specimen came from Waurn Ponds, and the same quarry 

 has also yielded a fragment of a molar and an additional prob- 

 able incisor. These are, it would seem, all correctly referred 

 to the same species. 



Still later^ E. B. Sanger described, a similar molar from beds 

 of the same age at Wellington, on the Murray River in South 

 Australia. To this he gave the name Zeuglodon harwoodi. I 

 have been unable to trace this specimen, which has apparently 

 disappeared, and Mr. J. J. Fletcher, the secretary of the Linnean 

 Society, is unable to give me any information about it. This 



1 Geol. Mag., v. 4 ; 1864, p. 145, pi. S, f. 1. 



2 Exhibition Essays, 1866. 



3 Annals and Mag. Nat. Hist., v. 20 ; 1867, p. 191. 



4 Prodronuis Pal. Victoria; decade 2, 1875, pi. ii,, ff. l-Ut. 



5 lb., Dec. 6, 1879, pi. 55, ff. 3-3b. 



6 Proc. Linn. Soc. N.S. Wales, v. 5, 1881, pp. 298-300, wdct. 



