Victorian Fossils, Part XX. 135^ 



about the junction of the Miocene and Lower Pliocene 

 (Janjukian and Kalimnan). 



SARGUS. — A representative of this genus is common in the 

 Miocene of New Zealand, but this is its first occurrence- 

 in Victoria, in beds of similar age. 



Description of Specimens. 

 PISCES. 



Fam. Carchariidae. 



Genus Carcharoides, Ameghino. 



Carcharoides totuserrafus, Ameghino. (Plate IX., Figs. 1 and 2.) 



Garcharoides totuserratus, Ameghino, 1901, Bol. Acad. Nac_ 

 Cienc. Cordoba, vol. XVI., p. 102. Idem, 1906. " Les Formations 

 Sedimentaires du Cretace Superieur et du Tertiaire de Patagonie." 

 Anales del Museo Nacional de Buenos Aires, ser. III., vol. VIII., p. 

 183 (footnote), and woodcut, fig. 50. Chapman, 1913, Vict. 

 Naturalist, vol. XXX., pp. 142, 143. 



Description. — The teeth of the Victorian specimens are, like those 

 from Patagonia (of Patagonian age), of moderate size. The base is 

 strong, but not so stout or heavy in proportion as in a tooth of the 

 genus Carcharodon, but more akin to that of Lamna, and angularly 

 inarched. The crown is strong and slightly and obliquely curved;, 

 apex sharp. External face depressed-convex, with a weak median 

 sulcus extending for about 3 mm. from the junction of the base- 

 upwards. Internal face depressed-convex. Lateral cusps blunt io. 

 Ameghino's type, but acute in well-preserved specimens, as that 

 from Torquay. Edges of crown and lateral denticles compressed, 

 thin and bluntly serrate, the serrations varying from mere crenulae 

 to stout serrations. Edge view of crown shows a slight flexure. 



Dimensions. — Ameghino's type. Total length, 26 mm. (crown, 

 18 mm.; base, 8 mm.). Width of crown at base, not including 

 cusps, 10 mm. ; thickness, 4 mm. 



Specimen from Torquay. Total length, 24 mm. Width at base., 

 15.25 mm. Length of crown, 17 mm. Width of crown, 9 mm. 

 Thickness of crown, 3 nmi. Height of lateral denticles, 4.25 mm. ;, 

 width, 3.25 mm. 



Specimen from Waurn Ponds. Total length, 22 mm. Length 

 of crown, 19 mm. (base imperfect). Width of crown at base, 9.75» 

 mm. Thickness, 3.5 mm. 



